Whispering Specter
Creature — Phyrexian Specter, {1}{B}{B}
Oracle Text
Flying
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Whenever this creature deals combat damage to a player, you may sacrifice it. If you do, that player discards a card for each poison counter they have.