It's Frantic Cleansing!

I don't think this card is black. It can play like Innocent Blood, but it can be Simplify, Tremble... it has things in common with Rite of Ruin and World Queller. If it's any colour I think it's white.

I also think 3 mana is rather a lot for it.

It also ''feels'' like Balance. (Though, obviously, not as insane as that). Agree three mana and a permanent seems like a high cost for the effect - but then, hey, it's (potentially) creature kill and that has to be stupidly expensive and crappy these days; right?

Its flexibility (force someone to nuke the core of their combo; or just keep someone land or creature starved) is pretty powerful though - and the ability to hit lands means it really cannot be much cheaper.

An, well, is the difference between 2 and 3 really that major? It's the sacrificing something that's the main cost part of this. So on second thoughts; it's probably fine.

Is it black? With the right flavour - sure. Black gets a theme of "I need this. I REALLY need it, I will sacrifice heavily to get it cheap." - and destroying or forcing another player to sacrifice is sure a thing black can do; even though the symmetry bit of it is more white than black.

Making a player sacrifice a creature can be cheap at common, even these days: see Devour Flesh.

As for that last paragraph, all I have to say is black will do anything to win.

Yes the focus is the facet of black that does anything to win. I thought about making this an instant but was not sure that black should get that fast of an answer to things on the field.