Armageddon [From the Vault: Annihilation] Nightstalker Morph {3}{R}{R}{R} (You may cast

Morph {3}{R}{R}{R} (You may cast this card face down as a 2/2 creature for {3}

When I send a message

Inventors Type: Creature — Goblin Artificer Rarity: Mythic Cost: {R} {T}: Choose target artifact a player controls and target artifact card in that player's graveyard

the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step

When Ancestral Knowledge enters the battlefield

Armageddon [From the Vault: Annihilation] Nightstalker Morph {3}{R}{R}{R} (You may castSet: From the Vault: Annihilation Type: Sorcery Rarity: Mythic Cost: {3}{W} Destroy all lands. A bloody dawn broke over a scabbed and tortured world.