Elemental Hero Hummingbird

Flying, lifelink
When Elemental Hero Hummingbird enters the battlefield, target an opponent. Elemental Hero Hummingbird enters the battlefield with X
+1/+1 counters on it, where X is the difference
in your life total and target opponents life total.
If Elemental Hero Hummingbird would be put
into a graveyard from anywhere, shuffle it into
its owner's library instead.