Culling the Weak ($15.19) A nerfed Dark Ritual is still a ritual, so its over $15 for Culling the Weak
Additionally, we prioritized permanents , as they usually stay on the board for longer and will give you card advantage again and again until your opponent can (or want) to remove them
I think I've told this story before, a long time ago, but when I first started playing Magic , my playgroup was uber-casualuntil another friend returned to the game and brought with him a fully powered Isochron Scepter / Orim's Chant deck, which he used to lock me out of doing anything several games in a row
So when one actually does, well, you get this kind of ridiculous price
That means you can put the ability on the stack, hold priority, and sacrifice it to another effect