Pernicious Deed? This is the sorcery speed version that also kills Planeswalkers. Guaran-damn-teed too kill everything you want dead, or your money back.
Assemble the Legion.
Goblin War Drums to Orcish Oriflamme and then throw some green mana on it. I didn't realize it was an enchantment until I cast it in the MTGO beta! (My MTGO username is MadOlaf, if you want to play a game or ten.)
It's a g-g-g-ghost! He spooks out your opponent's creatures so much they lose some of their oomph. Really helps when there are a ton of dudes on the other side of the table, and his own stats are nothing to sneeze at.
I'll do another one of these later. Let me know your favorite cards in the comments!