Militia

Description: +2 coins. Each other player discards down to 3 cards in his hand.
Type: Action - Attack
Cost: 4
Set: Dominion

Probably the first attack card you will be exposed to in Dominion.  It can get pretty annoying when someone picks up one of these cards and they keeps reducing your hand down to 3.  When someone picks up multiple militias, you should pick up at least one moat (if it's in play) to defend against it.