Virulent Sliver

Creature — Sliver

All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)

"They actually have venom, not poison. If they were poisonous, a single drop would—IT BURNS! IT BURNS!" —Riptide researcher, last words