Eagle Egg

This creature enters the battlefield with 3 time counters on it.
At the beginning of your upkeep, if this creature
has no time counters on it, create a green eagle creature
token with flying and X power and toughness,
where X
is this creatures power, then destroy this creature.
This creature can't attack or block.
{t}, put a +1+0 counter on this creature.
{t} Remove a time counter from this creature.