invasion of ikoria zilortha apex of ikoria march of the machine prerelease promosSet: March of the Machine Prerelease Promos Type: Battle Siege Rarity: Rare Cost: {X}{G}{G} (As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.) When Invasion of Ikoria enters the battlefield, search your library and or graveyard for a non Human creature card with mana value X or less and put it onto the battlefield. If you search your library this way, shuffle.