Cocoon of Evolution

During your end step, put a hatch counter on
Cocoon of Evolution.
Remove 4 counters: Sacrifice Cocoon of Evolution,
search your library for a card named "Great Moth",
put it onto the battlefield, and shuffle your library.
Remove 6 counters: Sacrifice Cocoon of Evolution,
search your library for a card named "Perfectly
Ultimate Great Moth", put it onto the battlefield,
and shuffle your library.