Blight Curse is a frequently-recommended individual precon thanks to strong reprint value and the power level of -1/-1 counter strategies in Commander, though deck power is always playgroup-dependent
Your ramp, draw, interaction, and threats should all point in the same direction
Instants Darkness It might just be me, but it seems that Fog type cards have fallen out of favor the past few years
(When this equipment enters create a colorless 1/1 Hero creature token and attach this to it.) Equipped creature gets +2/+2, has Trample and Haste, and is a Samurai in addition to its other types
With any combo you can assemble that involves sacrificing a creature an infinite number of times, Sephiroth can then serve as your win condition
Other cards that retail around $10 from Outlaws of Thunder Junction include borderless Goldvein Hydra, Slickshot Show-Off, Jace, the Reawakened, and Railway Brawler