­Seraph of the Sword+Resummon Warrior

Well, that was easy. A creature that avoids dying to combat damage, and a spell that undoes dying. I debated over some details, but I feel like that's more of a mashup than I usually manage :)

I'm not sure if the result quite makes sense, but it seems reasonable. Lots of abilities recur a creature with some limitation, and this only works if it was dealt combat damage so it avoids infinite recursion shenanigans (iirc, once it returns it counts as a different object).

Reminds me of Phytotitan. But if anything I think I prefer this. Less abusable with sacrifice effects, but more useful for the "normal" use case.