Each other player discards down to 3 cards in hand. Each other player reveals the top 2 cards of their deck, trashes one of them costing from 3 Coin to 6 Coin, and discards the rest. If a Knight is trashed by this, trash this.
Sir Michael is one of the ten Knight cards from Dark Ages. Like the other Knights, he is an Action-Attack-Knight that trashes other players' cards(trashing attack). He is also a discard attack, forcing other players to discard down to 3 cards in hand.