The Ur-Phoenix

Flying.
Whenever another creature with flying enters
the battlefield under your control put a +1/+1
counter on The Ur-Phoenix.
Other attacking creatures you control with
flying get +X/+0 where X is The Ur-Phoenix's
power.
When The Ur-Phoenix dies return up to one
target creature without flying from your
graveyard to play under your control and
place a flying counter on it.