First of all, Corrupt doesn't work very well outside of monoblack, as opposed to this card, which is very splashable.

Second of all, why would you use Wound Reflection without some good ways to make your opponent lose life? Cards don't exist in a vacuum. Yes, Fling doesn't do anything if you don't have any creatures in your deck. The thing is, why would you put Fling in a creatureless deck? It's the same idea here.