Molthovi, War Crasher

Creatures you control have battle cry. (Whenever
a creature you control attacks, each other attacking creature gets +1/+0 until end of turn.)
Whenever Molthovi, War Crasher attacks, it gets
+X/+0 until end of turn, where X is the number
of attacking creatures you control.
He lives only for the thrill of war. His crushing
charges shatter armies.