Ha! This has been white (Repentance) and black (Kiku's Shadow); it's a bit odd to see it in red, but it's hard to say any "deal damage" instant is really out-of-pie for red, so okay.

And yep, now Dark Ascension has come along and printed this in red: Wrack with Madness.

Sometimes I think R&D passes stuff through the system just to mess with casual designers. "What taboo can we break today?" "Well, what if we reprinted Roc of Kher Ridges, but gave it the samite healer ability. We'll argue that red knows enough about dealing damage, that it knows how to undo it as well. It just isn't effecient at it. Then we can print a red Sanctum Custodian in the next block to mess with them. So how's the Mythic Rare dual land cycle coming?"