Mad Scientist
Action, 2$
+ 1 Card
Trash a card from your hand. If it was...
An action card: +2 Actions + 1 Buy
A treasure card: + 1$
A victory card: + 1 Card
When the player to your left gains a card costing 4$ or less, you may reveal and discard this from your hand. If you do, either you or he gains another copy of that card, your choice
I think the reaction part is really unfair. If my right neigbor has a MS strategy and another player plays cursers, i have lost allready.
Observatory
Action, 3$
+ 1 Action
Reveal the top 3 cards of your deck. If you revealed at least one Victory card, put all the revealed cards in your hand. Otherwise, discard them.
Fair and some kind of a fixed Scout. I guess it's better than the original, but then this doesn't say a lot.
Sacred Cavern
Action, 4$
You may trash a card from your hand. If you do: + 4 Cards
Each other player may trash a card.
This is quite strong. I kind of like it.
Recreate
Action, 4$
trash a card from your hand. If you do, chose one: Gain an action card costing exactly 1$ more then it, putting it in your hand. Or: Gain a silver.
Might be overpowered.
Will post text versions of the rest, but this for now before somebody starts doing the same.
Edit: Second part
Ghost Town
Action, 5$
+ 1 Card
+ 2 Actions
Trash a card from your hand. If it was a card costing 3$ or more: + 2 Cards
As i compared this to Junk Trader, it first seemed overpowered. The fact that you only get cards if the trashed one costs 3$ or more makes me think it could be balanced.
Elixir
Treasure, 5$
2$
You may trash this card immediately. If you do: +1$, gain a Silver.
Reminds me of my "Stocks". I think it's balanced.
Philosophers (Ver 1)
Action, 4$
+ 2 Cards
Gain a card costing less then this. if it was a Curse: +1 Card, + 1 Action, + 1 Buy, +1$
A bit too strong for me. The effect without the curse clause alone is at least a 3$ (Silver is almost always a nice thing to gain), but if there's good trashing on the board, it's even better.
Philosophers (Ver 2)
Action, 5$
+ 3 Cards
Gain a card costing less then this. If it was a Curse: + 1 Action, +1 Buy, + 1$
So this is a Smithy with a Workshop, which is a 5$ by itself, methinks. The Curse clause makes this not that much better, but still...
Coven
Action - Attack - Looter, 5$
+ 2 Cards
+ 1$
Discard three cards from your hand. If you discarded three differently named cards this way, each other player gains a Curse and a Ruins.
I don't know yet whether i find this too weak or to hard an attack. Maybe both? I really don't know.
Commander
Victory, 6$
2 VP
When you buy this, gain a Reenforcement card, putting it on top of your deck.
Add an extra kingdom card pile to the supply costing 5$ or 6$. Cards from that pile are Reenforcement cards. Reenforcement cards can not be bought.
Can they be gained? For example by Altar? If not, they are not part of the supply. Just saying.
Edit 2: Just found out that "Leitmotif" is an actual english word. *Shiver* As a german, that a misspelling of "Leitmotiv" irritates me.
Edit 3: For all those who can't see the images: Many look really good. I like Elixir most.