Damnation
 
I'm going to make a possibly controversial argument and state that this might be the best Wrath of God variant. But it's just Wrath of God, you say, except in black. And you'd be technically correct (the best kind of correct, according to Hermes Conrad). Remember, though, that those little mana symbols in the top corner aren't just an indication of how many of your five-color lands you have to tap, but how many you have to try and jam in your deck in the first place. There's not always as much of a penalty for stretching your manabase as there was in the late 90s, but you don't always want to - sometimes it shifts the focus of your deck, and sometimes you just don't feel like. A mono-black version of this effect, at this cost, enables somewhat unusual archetypes like black-red or mono-black control, and your opponent may even forget it exists on occasion and think they can overextend against your blue-black deck. I know there is an argument about what Planar Chaos' color-shifted cards do for the color pie, but as time goes on I increasingly think that nothing should stand in the way of having fun in Magic, not even the color pie.
 
Constructed: 4/5
Casual: 4/5
Limited: 4/5
Multiplayer: 4/5
EDH/Commander: 4/5