Kappa. and Kappa, also fail to draw the Kappa as a side note.
So if you send a “Shell of the Last Kappa,” like I direct copy pasted from your OP that will fail to draw. (Basically follow the card name with punctuation). Unrpintables probably work best, or swap the K for the unicode K equivalent.
(Spammers like to swap the K or the first a for the unicode equivalent with “OMG My Kappa not working”, at which point I usually punch them in the face for promoting channel spam)