­Ivory Cup + Albahri Zealot

White spells are worth life. And dead people (or at least preists) kill things.

Dead people are worth life? It's been done (Starting at Soul Net), but it's still a decent enough thing.

White spells kill things? ... Um, gosh. That's an odd idea. Could do it as a significant punishment card? "All your spells have an additional doomblade on them" is very not white, and also scarily powerful. Could maybe do it as an ultimate, or an 8-9 cost creature, but would be better with an excuse.

Normal excuses for white are "you attacked me" though sometimes "You're too big" is used. So... "Whenever a white spell is cast during combat, you may destroy target creature."? Eh, it would kinda work? Doesn't feel particularly exciting.

Ok, not getting anywhere here. Let's try a name mash. Well, clearly "Ivory Zealot" is a white rhino. Cool.

Ok, the simplest thing here is to make it only when this creature dies. Which is then clearly the opponents fault, and punishing them is just fine. And let's not make it optional destruction because although that's much more of a red thing than a white thing - I can't imagine a zealous rhino not making stuff explode when it has the chance.

Size... bunch of choices here. Small makes it easier to trigger; large is harder but more likely for the opponent to need to kill it. I think we'll err on the side of "Rhino's are pretty big, right?" and go for about 4/4 ish?

No evasion, but it does have a different upside. So probably needs to cost 5? I guess I could make it a mythic and give it square stats and cmc4, but neither nor the ability cries out for mythicness. So let's try it as 4/4 for 5. Even if that's a bit messy.

Mechanic complexity and dangerousness; could be uncommon. But it's a bit of a colour stretch and unusually large for a on-angel white-thing. So I'll set it rare.

Seems worse than Archon of Justice in several ways.