amonkhet mtg cards Festering Mummy FOIL Artist Proof - Magic the Gathering a plaver buts the top three cards of their library into their graveyard.) March of the Machine (MOM) #231 Illustrated by Jokubas Uogintas Magic Amonkhet Cards That I've Bought

Any "as [this creature] enters the battlefield" or "[this creature] enters the battlefield with" abilities of the copied card will also work

Lurrus specifically and companions in general almost immediately broke the game, dominating quite literally every format in existence until Wizards was forced to take the unprecedented step of errata'ing the entire mechanic by essentially adding a three-mana tax to companions

Since then, it has been reprinted multiple times, appearing in Jumpstart, Murders at Karlov Manor Commander, and now MTG Foundations

Whatever, you want, you got it

Even though it appears on creatures in some releases, it's never a creature type

When in play, a huge number of Planeswalkers can activate their ultimate ability from the moment they hit the board