Of course, this ability is a significantly weaker in a multiplayer game, but chances are, the players who are not targeted by its ability won't see it as a threat, so it's not at a big risk of being removed from the board
My inspiration for this card was Wickerbough Elder, and I've been trying to get a variant of this card in a set for a while
Freerunning Callidus Assassin or either version of Massacre Girl, among the various other cards that make assassin typal a thing, does sound kind of cool
Pretty Pumpkins card to show you
(The exact restrictions are more specific, but thats the general idea.) Other formats, such as Modern and Legacy, dont rotate at all, meaning the pool of cards that you can choose from grows with each new set release