Opponents with decks whose curves extend to seven and play cards at random don't fear the Keg, they just respect it
It includes: Olorins Searing Light, Sorcerous Squall, Rammas Echor, Ancient Shield, Courageous Resolve, Gandalf of the Secret Fire, and Fell Beasts Shriek
This one asks a little more, thoughyoull need to pay five mana at the beginning of your next upkeep or youll lose the game
Add on top of that evasion, ward, and getting a +1/+1 each time Valgavoth triggers that card draw, and you've got the perfect commander to build a red/black deck around.
Interaction A few counterspells help keep people honest when you have blue mana up to potentially stop their game-winning combo, or a pesky battlefield sweeper that will otherwise send your glorious Dragons to the graveyard
Okay, this brings us to nailing down a second color