Rotting Rats
Planechase — Common
Creature — Zombie Rat
Rotting Rats rulings:
2009-02-01: When Rotting Rats's "enters" ability resolves, first the player whose turn it is chooses a card to discard, then each other player in turn order does the same, then all cards are discarded at the same time. No one sees what the other players are discarding before deciding which card to discard.