KTo from the Btn

[EGO]

Call. Eight spades give you a decent flush, and one spade gives you the nut flush. You are closing the action, and getting 9-1. Call.

Edit:
Getting 3-bet here with K high sucks. There is also the (remote) possibility of someone having a straight flush draw with a small suited connector. There's no way I fold, but I'm not so hot about a raise.