Like, have you ever played pretend with a kid who keeps giving their character new abilities on the spot? This kinda reminds me of that. "My character can swallow people whole." "Ok, this character can just astral project and make a new body." "Oh, well, uh, my character's stomach is astral projection proof." "Ok, they can just do it after they pass from digestion." "Um, no, because my character also digests souls."