Vega, the Watcher Vega, the Watcher gets better and better as more mechanics that let you cast cards from exile pop up
So no to colorless mana rocks like Worn Powerstone, and yes to multicolor mana rocks like Commander's Sphere
6 Angelic Sell-Sword Double Up Outlaws Angelic Sell-Sword turns one creature into two so long as it is a nontoken
Lets start with the against the odds plan first: some players are hyped about using Rotpiest as a combo piece, trying to storm off and target it a bunch of times with something like Ground Rift to poison the opponent out of the game
If using the Grey Wanderer contract, either one of these could be put into play right at the start of the game
Sac outlets that dont cost mana can be taken advantage of to perform loops and combos, and so picking up one or both of these is an excellent way to kickstart your collection