Nakarkos, Corpse Dragon

When Nakarkos, Corpse Dragon enters the battlefield, create two 2/2 blue tentacle creature tokens named Head of the Corpse Dragon.

{2}, {t}, Exile two creature cards from your graveyard: If Nakarkos isn't an Octopus, it becomes
an Octopus in addition to its other types. Create token copies of the exiled cards, except they're 2/2 blue Tentacle creatures. Activate only if you control no Tentacle creatures.