Corrupted — Create an X/X green Phyrexian Wurm creature token with
trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) and
toxic 1
(Players dealt combat damage by this creature also get a poison counter.), where X is the amount of mana spent to cast this spell. Then for each opponent with three or more poison counters, you create another one of those tokens.
Flashback 

(You may cast this card from your graveyard for its flashback cost. Then exile it.)