Sneaky Ostrich

Hexproof, unblockable.
Whenever Sneaky Ostrich deals damage to an opponent, create an Egg token with "Put an
eclosion counter on this token at the beginning of
your upkeep. If this token has
3 or more eclosion counters on it, sacrifice it
and create a non-legendary copy of
Sneaky Ostrich."
"Nobody suspects an ostrich"
-Ajani Goldmane