Welcome Cthulhu, the first in a line of Monster Packs designed to expand the "King of" family! Now you can deploy fishy cultists in the streets to help summon victory!
The Cthulhu Monster Pack is compatible with King of Tokyo and King of New York, as well as their expansions. Cthulhu's Evolutions work like the Evolutions in King of Tokyo: Power Up! And King of New York: Power Up! To play with Cthulhu's Evolutions, you need the Power Up! expansion for whichever base game you have.