As cool as Assassins Creed is, this is just bad value for a consumer
UB is a strange color identity for a sea creature deck, but Runo presents a fun mini-game to get it flipped, and Krothuss, Lord of the Deep is one of the best sea creature payoffs you could ask for
Where the card becomes interesting is in decks that care about sacrifice effects, temporary theft, or opponent interaction , allowing the Goat to act as a disposable resource instead of a threat
It also made use of the party mechanic
Then, anytime you cast another colorless spell with Ugin in play, you'll exile another permanent that is one or more colors
Weve had all of these effects before on creatures, and theyre always on cards that end up becoming essential, so were expecting the same here, even if Coven can be tricky to manage