User blog comment:Gerokrat/Darius rebalance/@comment-7709681-20140504152951

You ult would be reasonable if it deal much less damage, or even eliminate it. It by itself executes target's (now is plural) under low health on a single cast, with a short cooldown and can reset.

I, speaking for none, say that the idea of damage that ignores invulnerabiliy would be interesting, but now as it is... well... just read the sarcastic comments below, sorry. :/