
Mutate {2}{G} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Whenever this creature mutates, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Migratory Greathorn has 3 printings, first in Ikoria: Lair of Behemoths (2020). EDHREC ranks it #5,590 among Commander cards. It appears most in Ivy, Gleeful Spellthief decks (4,051 on EDHREC). 1 public deck on TCG runs it.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.