Scout the Giver

Gift an Egg (You may promise an opponent a
gift as you cast this spell. If you do, when it enters, they create a 0/1 green Egg creature
token with Defender.)
At the beginning of each end step, create a
token that’s a copy of target creature token
that entered the battlefield this turn.
Incubate {5}: (Target Egg token becomes a
5/5 green Bird creature with flying.)