@Raijinslayer I once built a black/green/blue deathtouch deck. It ran a lot of enchantments, and a lot of unblockable creatures with reach. Basically, it was the biggest asshole deck ever devised. It wasn't even made to win, just to be infuriating.
On the opposite end, the monoBlack deck i made for the same purpose ended up being an insane player-killer. It ran nothing but masochistic Horrors, and land enchantments. Basically, the deck was designed to make every player die at the same time, including myself. It would drain life from everyone every turn, and every time they tapped enchanted land, and I kept... what was it... Corruption on hand for lifegain when it was necessary, just so I could make sure I finished everyone.
The deck hurt itself so much, no one I ever played with did more damage to me than I did.
Also, I don't talk about Slivers.
No one should.