The results for the Reaction card challenge are in! As a reminder, here was the objective:
Create a card that has the "Reaction" type. The card may have other types as well. The card text must clearly specify the event or events that may activate the reaction card and what the reaction card does when activated.
The trigger event for the Reaction may not be an event that already exists on an official card that is NOT a Reaction. For example, since Nomad Camp is not a Reaction card, you may not submit a Reaction card with the trigger event "When you gain this...."
Reaction cards can be tricky to evaluate, especially those whose usefulness is situational (e.g., Tunnel, Market Square), in part because the Reaction component is usually just half the card and also in part because we have relatively few official cards to use as examples.
As with the +Buy challenge, the votes were pretty spread out. And once again, we have a tie! Interestingly, both also offer +Buy. Your two winning Reaction cards are:
#1 (tie) - Silver Smelter by
jamespotter with 12 points
(Blackjack)$3 - Action-Reaction
+1 Action
+1 Buy
+$2
Discard 2 cards.
--
When you discard this from your hand other than during a Clean-up phase, you may reveal it. If you do, +2 Cards.
#1 (tie) - Landfall by
eHalcyon with 12 points
(Euchre)$3 - Action-Reaction
+2 Cards
+1 Buy
--
When another player gains a Victory card, you may set this aside from your hand. If you do, then at the start of your next turn, +2 Cards, +1 Buy, and discard this.
Silver Smelter is a situational Silver that offers +Buy but cannibalizes your hand pretty severely. You probably need the reaction ability (or desperately need +Buy) to want this, and to use the reaction at all, you need a discarder. But, oh, look, Silver Smelter is itself a discarder! It'll also turn an Oasis into a Laboratory+Market and undo the effects of a Militia (you discard all cards to Militia at once, then reveal and activate Silver Smelter). But in exchange for its self-synergy, it doesn't get activated by as many other cards as Tunnel does -- an Adventurer, for example, won't increase your hand-size, no matter how many of these things you skip over in search of Treasures.
Our second winner is a weak vanilla card whose effects can sometimes be postponed to the next turn. What good is that, you say? Well, on the next turn it doesn't use up an action to capitalize upon, which means that +2 Cards is a Laboratory rather than a Moat. Additionally, +Buy is something that might well go to waste on any given turn, so having a way to defer it when you don't need it could be quite useful. But it's a late-game card: early on, this is probably usually pretty bad.
Hot on the heels of the winners:
#3 (tie) - Diviner by
PurplePotato with 10 points
(Crazy Eights)$3 - Action
+1 Card
+1 Action
Look at the top card of your deck. You may discard it or put it back.
--
When you would discard a card other than from play, you may reveal this from you hand. If you do, trash that card instead.
#3 (tie) - Repair Shop by
Mecherath with 10 points
(Canfield)$5 - Action-Reaction
Gain a card costing up to $4.
--
When you gain a card you may discard this. If you do, trash that card and gain a card costing up to $2 more.
#5 (tie) - Sappers by
werothegreat with 8 points
(Michigan)$4 - Action-Reaction
+2 Buys
+$2
--
When another player plays an Attack card, you may reveal this and set it aside. At the start of your next turn, play this immediately, without using an Action.
#5 (tie) - Memorial by
yuma with 8 points
(Frog)$5 - Action-Reaction
+1 Card
+1 Action
+1 VP
--
When another player gains a VP token, you may reveal and discard this card; if you do, +3 Cards.
#5 (tie) - Tallager by
RobertJ with 8 points
(Cribbage)$5 - Action-Reaction
+2 Cards
+1 Action
+$1
Discard 2 cards.
--
When any player gains a Victory card you may reveal and discard this, if you do gain a Gold.
#8 (tie) - Farmer's Market by
nopawnsintended with 7 points
(Hearts)$4 - Action-Reaction
+1 Card
+2 Actions
--
When you reshuffle, you may reveal this card from your hand and set it aside. If you do, trash a card from your hand, and at the beginning of next turn, +$1 and return this to your hand.
--
(Rules clarification: If you draw this into your hand and trigger a reshuffle before drawing up to X cards in hand, resolve the reaction part of the card first (set this aside and trash a card from your hand). Then, continue drawing up to X cards in hand.)#8 (tie) - Fief by
Archetype with 7 points
(Anaconda)$3 - Victory
Worth 2 VP
--
Whenever you gain a Victory card costing $6 or less, you may reveal and trash this card from your hand. If you do, gain a copy of it.
#10 (tie) - Guarded Village by
One Armed Man with 6 points
(Pinochle)$4 - Action-Reaction
Look at the top 2 cards of your deck. Discard one of them. Put the other one on top of your deck.
+2 Actions
+$1
--
When another player plays an Attack card, you can discard this to gain a Guarded Village, placing it on top of your deck.
#10 (tie) - Dog Keeper by
ignorentmen with 6 points
(Bridge)$4 - Action-Reaction
+1 Card
+1 Buy
+$2
Discard 2 Cards.
--
When an opponent buys more than one card during his buy phase, you may reveal and discard this card; if you do +1 Card, gain a Silver to your hand.
#12 (tie) - Ivy by
ashersky with 5 points
(Shanghai)$3 - Victory-Reaction
Worth 1 VP
--
When you draw this other than during a Clean-up phase, you may reveal it and immediately discard it. If you do, +2 Cards.
#12 (tie) - Forger by
Fuu with 5 points
(Jass)$5 - Action-Reaction
Discard an Action card from your hand. If you do, gain a copy of the discarded card.
--
When you gain an Action card, you may discard this from your hand. If you do, gain a copy of the gained card.
#14 (tie) - Reinforcements by
angrybirds with 4 points
(Rummy)$3 - Action-Reaction
+2 Cards
--
When your discard pile is empty, you may reveal and discard this card. If you do +3 Cards.
#14 (tie) - Carver by
popsofctown with 4 points
(Pitch)$3 - Action-Reaction
Trash a card from your hand. Gain a Silver.
--
When you gain a card, you may reveal this from your hand. If you do, put that card into your hand.
#14 (tie) - Piggy Bank by
Saucery with 4 points
(Piquet)$4 - Action-Reaction
+$1
Set aside up to 2 Treasure cards from your hand on your Piggy Bank mat. Cards on your Piggy Bank mat may be returned to your hand at the start of your buy phase. Return them to your deck at the end of the game.
--
When you would gain a card, you may reveal this from your hand. If you do, instead, gain a Copper, setting it aside on your Piggy Bank mat.
#14 (tie) - Marquess by
Davio with 4 points
(Pennies From Heaven)$4 - Action-Reaction
Discard a Victory card from your hand.
If you do, gain a Silver, putting it in your hand.
--
When an opponent gains a Victory card, you may reveal and discard this from your hand. If you do, gain a Victory card costing up to $3 less than that card.
#14 (tie) - Chimney Sweep by
Drab Emordnilap with 4 points
(Cuttle)$4 - Action-Duration-Reaction
Now and at the start of your next turn:
+1 Card
Trash a card from your hand.
--
Whenever another player trashes a card, you may play this card.
#19 (tie) - Jewelled Dagger by
Adrienaline with 3 points
(Wichita)$3 - Treasure-Reaction-Attack
Worth $1
Reveal the top card of your deck, you may trash it or add it to your hand.
--
When an opponent gains a card during their turn, you may reveal this to place the gained card on top of their deck instead.
#19 (tie) - Warrior by
dnkywin with 3 points
(Poker)$3 - Action-Reaction
+1 VP
--
When another player gains a Province, you may trash this card from your hand. If you do, gain a Duchy.
#19 (tie) - Village Idiot by
PenPen with 3 points
(Old Maid)$2 - Action-Reaction
+2 Actions
--
When another player plays a card with the wording "+2 Actions" you may set this card aside from your hand. If you do, at the start of your next turn, return this card to your hand and +1 Card.
#19 (tie) - Falconer by
Tejayes with 3 points
(Klondike)$4 - Action/Reaction
+2 Cards
+$1
--
When you discard a card from your hand or your deck, you may reveal this from your hand. If you do, put that card on the top or bottom of your deck, your choice.
--
(Rules clarification: You must discard the card directly from your hand or your deck in order to use this card's Reaction ability. If the card must first be set aside, such as with Library or Adventurer, this card's Reaction ability cannot be used.)#19 (tie) - Overreact by
Bella Cullen with 3 points
(All Fours)$4 - Action-Reaction
+$2
--
When you discard a card from your hand other than during your Clean Up Phase, you may reveal this and set it aside. If you do, gain a Gold and discard an additional card.
--
(Rules clarification: Cards set aside are returned to your hand at the start of your next turn or discarded at the start of your next Clean Up Phase, whichever comes first.)#24 (tie) - Necromancer by
RichardNixon with 2 points
(Whist)$4 - Action-Reaction
+3 Cards
You may discard a Curse. If you do, +1 Action. If you do not, gain a Curse.
--
When you would gain a Curse, you may discard this from your hand. If you do, your opponents gain a Curse instead.
#24 (tie) - Commune by
Fragasnap with 2 points
(Savannah)$4 - Action-Reaction
+2 Actions
+1 Buy
+$1
--
When you draw this during a Clean-Up phase you may discard it. If you do, +2 Cards.
--
(Rules clarification: If you draw a Commune during your Clean-Up phase, even as a result of discarding a Commune, you may choose to discard it for its draw effect. You do not need to discard it the moment you draw it, only before you declare your Clean-Up phase over.)#24 (tie) - Doctor by
Qvist with 2 points
(Go Fish)$4 - Action-Reaction
+$1
Trash up to two cards.
--
When you would trash a card, you may reveal this from your hand. If you do, discard this and put the trashed card aside.
Put that to your discard pile in your clean-up phase.
#27 (tie) - Thorp by
Polk5440 with 1 point
(Tribello)$2 - Action-Reaction
+2 Actions
Choose one: Draw a card and discard a card, or +1 Buy.
--
When you discard a Victory card, you may reveal and discard this from your hand. If you do, gain a Treasure costing up to $6.
#27 (tie) - Decree by
Robz888 with 1 point
(Spades)$7 - Action-Duration-Reaction
Now and at the start of all future turns: +$1.
--
While this is in play, when the game ends, you may reveal this from your play area. Take an extra turn after the game has ended. This can't cause you to take more than one turn after the game has ended.
#27 (tie) - Ridge by
Schneau with 1 point
(Scoundrel)$4 - Victory-Reaction
Worth 2 VP
--
Whenever a player (including you) plays a card that instructs you to draw exactly 1 card, you may reveal this card from your hand. If you do, +2 Cards instead.
#27 (tie) - Hole by
NoMoreFun with 1 point
(Poch)$3 - Action-Reaction
Select a card on your Hole mat. Choose one; trash it, or put it on top of your deck. Set aside a card from your hand onto your Hole mat.
--
When you gain or trash a card, you may reveal this from your hand. If you do, put it on your Hole mat.
--
At the end of the game, trash this and trash all cards on your mat.
#27 (tie) - Metal Worker by
Rush Clasic with 1 point
(Ninety-Nine)$4 - Action-Reaction
+1 Buy
Gain a Silver, putting it in your hand.
--
Whenever a player gains an additional buy, you may reveal this from your hand. If you do, choose one: Silver produces $3 when played this turn; or Silver produces $1 when played this turn.
--
(Rules clarification: If multiple players reveal this card, resolve them in turn order, starting with the active player. The result will always be that the last player in turn order to reveal this card will choose the final outcome.)#27 (tie) - Soldier by
Tables with 1 point
(Monastery)$2 - Action-Attack-Looter-Reaction
Each other player gains a Ruins.
--
When another player plays an Attack card, you may reveal this from your hand. If you do, discard any number of cards and put the rest on top of your deck in any order, then discard this card. At the start of your next turn, +5 Cards.
#27 (tie) - Reverbatory by
Guy Srinivasan with 1 point
(Finish Line)$5 - Action-Reaction
+3 Cards
--
When another player buys a Duchy you may trash this from your hand. If you do, +1 Card and gain a Duchy.
#27 (tie) - Xxxxx by
Graystripe77 with 1 point
(Casino)$4 - Action-Reaction
+$2
You may set aside this and and a card from your hand onto your Xxxxx mat.
You may trash a card from your Xxxxx mat.
--
When you gain a card, you may reveal this from your hand. If you do, put the card on your Xxxxx mat. At the end of the game, return all cards on the Xxxxx mat to your deck.
#35 (tie) - Surgeon by
Nicrosil with 0 points
(Tripoli)$3 - Action-Reaction
+2 Cards
--
When any player plays an Attack, you may reveal this from your hand and set it aside. If you do, after the Attack resolves, discard this and +2 Cards.
#35 (tie) - Woodshop by
Kirian with 0 points
(Pyramid)$5 - Action-Reaction
+1 Buy
+$2
--
When another player gains a non-Victory card with a cost of up to $4, you may reveal this card from your hand and discard it. If you do, gain a copy of the gained card.
#35 (tie) - Reversal by
Buggy with 0 points
(Knaves)$4 - Action-Reaction
+2 Cards
Discard 2 Cards.
--
You may reveal Reversal from your hand when discarding it due to an Action. If Reversal is among the cards discarded, you may draw the same number of cards after discarding.
#35 (tie) - Industrial Espionage by
Michaelf7777777 with 0 points
(Klabberjass)$5 - Action-Reaction
+2 Cards
--
When another player gains a card, you may discard this card. If you do you may gain an Action card costing at most $2 less than it.
#35 (tie) - Scriptorium by
DWetzel with 0 points
(Jungle)$3 - Action-Reaction
+2 Cards
--
When any player (including you) gains a card without buying it, you may reveal and discard this card. If you do, you may take a copy of the gained card from the supply and place it in your hand.
--
(Rules clarification: Cards placed in your deck as a result of Scriptorium's reaction are not "gained," in the same way that you don't "gain" cards with Masquerade, so this card may not be revealed in a response to other people revealing this card.)#35 (tie) - Engineer by
Sakako with 0 points
(Horseshoe)$5 - Action-Reaction
Discard any number of cards. For each card you discard, +1 Action, +1 Card, +1 Buy.
--
When you would gain a card, you may reveal this from your hand. If you do, instead, gain a Copper, putting it into your hand.
#35 (tie) - Anvil by
JFugue with 0 points
(Canasta)$4 - Action-Reaction
Gain a Copper, putting it on top of your deck.
+3 Cards
+1 Buy
--
When a card played as an action would cause you to gain a card, you may reveal this from your hand. If you do and if this is the first time you have revealed Anvil in reaction to that action, you may trash the gained card or gain an additional copy of it.
--
(Rules clarification: A card played as an action means that this card cannot react to the gaining effect of Fool's Gold or Market Square or the additional copies gained by itself, for example. If you play two Workshops while this card is in hand, you may react to both, gaining an additional copy of the gained card each time if desired; but if you play one Workshop while you have two copies of this card in hand, you may react with both, but only the first will allow you to gain an additional copy of, or trash, the gained card.)#35 (tie) - Venom by
Powerman with 0 points
(Baccarat)$4 - Action-Reaction
+3 Cards
Discard 2 cards.
--
When another player plays an Attack card, you may reveal and discard this from your hand. If you do, your opponent trashes that Attack card, and you both may gain a card costing at most $2 less than the trashed card; +1 Card.
--
(Rules clarification: Your choice of gained card and your opponents choice are independent of each other.)