Inspired by the Possession attack thread, I wanted to make a list of how strong I think the attacks in the game are. Not the attack cards, but the attack itself.
There were some issues with making the list of attacks. I had to reword some of the cards to better reflect the attack only aspect. And then there were cards like Margrave that got the draw a card, then discard, and Soothsayer that didn't get the draw a card. If you make your own list, feel free to include or exclude those.
Anyway, here's my list of the attacks. From worst to most powerful.
Each other player reveals the top card of his deck and either discards it or puts it back, your choice.
Each other player reveals the top 2 cards of his deck. If they revealed any Treasure cards, they trash one of them that you choose. They discard the other revealed cards.
Each other player discards down to 4 cards in hand.
Each other player reveals a Victory card from his hand and puts it on his deck (or reveals a hand with no Victory cards).
Each other player reveals the top 2 cards of his deck, and you choose one: either he discards them or he puts them back on top in an order he chooses.
Each other player discards a Copper card (or reveals a hand with no Copper).
Reveal a card from your hand. Each other player gains a copy of it.
Each other player discards the top card of his deck. If it's a Victory card he gains a Curse. Otherwise you may have him gain a copy of the discarded card.
Each other player reveals the top 3 cards of his deck, discards the revealed Actions and Treasures, and puts the rest back on top in any order he chooses.
Each other player trashes the top card of his deck and gains a card with the same cost that you choose.
Each other player reveals cards from the top of his deck until he reveals a Victory or Curse card. He puts it on top and discards the other revealed cards.
Each other player with at least 5 cards in hand discards his hand and draws 4 cards.
Each other player chooses one: he discards 2 cards; or he gains a Curse card, putting it in his hand.
You may reveal a Treasure from your hand. Each other player with 5 or more cards in hand discards a copy of it (or reveals a hand without it).
Each other player draws a card, then discards down to 3 cards in hand.
Each other player reveals the top 2 cards of his deck, trashes one of them costing from 3 to 6, and discards the rest.
Each other player reveals cards from the top of his deck until revealing one costing 3 or more. He trashes that card and may gain a card costing at most 2 less than it. He discards the other revealed cards.
Each other player gains a Ruins.
Each other player reveals the top 2 cards of his deck, trashes a revealed Silver or Gold you choose, and discards the rest. If he didn't reveal a Treasure, he gains a copper.
Each other player discards down to 3 cards in his hand.
Each other player with 4 or more cards in hand puts cards from his hand on top of his deck until he has 3 cards in his hand.
Each other player may discard a Curse. If he doesn’t, he gains a Curse and a Copper.
Each other player with 5 or more cards in hand reveals his hand and discards a card that you choose.
Each other player may reveal a Bane card from his hand. If he doesn't, he gains a Curse.
Each other player gains a Curse.
Each other player discards the top card of his deck, then gains a Curse, putting it on top of his deck.
Each other player gains a Curse and discards down to 3 cards in hand.