Atla Palani, Nest Tender

{2}, {T}: Create a 0/1 green Egg creature token with defender.
Whenever an Egg you control dies, reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.

Mysterious Egg

Whenever this creature mutates, put a +1/+1 counter on it.

Anointed Procession

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

Roc Egg

Defender (This creature can't attack.)
When Roc Egg dies, create a 3/3 white Bird creature token with flying.