Pale Colossus

When Pale Colossus enters the battlefield,
discard any number of cards. For each card
discarded this way, each opponent loses 2 life
and you gain 2 life.
If you would gain life, you may instead create a
0/1 black Thrull creature token. Sacrifice that
creature if you have more than four cards in
your hand.
An unending army, that will drain the world