Tainted Observer

Creature — Phyrexian Bird — {1}{G}{U}

Flying
Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
Whenever another creature you control enters, you may pay {2}. If you do, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Rarity: uncommon

EDHREC rank: 7135