Citadel Wurm

Citadel Wurm enters the battlefield with X
+1/+1 counters on it.
When Citadel Wurm enters the battlefield, you
create X 0/1 red Wurm creature tokens.
When Citadel Wurm dies, it deals X damage to
you, where X is its power.
"Soo... why are we using that... thing?" "Dunno mate,
some new war strategy."