Compleated Tiamat

Compleated Tiamat enters the battlefield with X
-1/-1 counters where X is the life payed while
casting this spell.
Whenever Compleated Tiamat kills a creature,
remove a -1/-1 counter from Tiamat and create a
2/2 black Phyrexian creature token.
When Compleated Tiamat dies, all players
venture into Phyrexian Dragon God's Dungeon.