Oceiros, the Consumed King

Trample, lifelink
Whenever Oceiros, the Consumed King enters
the battlefield, or blocks create a 2/2 blue
Oceiros Spawn creature token.
Whenever an Oceiros Spawn creature token
leaves the battlefield, Oceiros, the Consumed
King gets +2/+2, and gains flying, double strike,
and vigilance until end of turn.