Colossus Hammer Reprinted in the AFR Commander Precon, Colossus Hammer has a foil version from M20 that is still worth around $20
Just make sure you dont sacrifice more lands than you have left in your deck
Contents: -12 Dominaria Remastered Collector Boosters
If you're not after promos or coins and are looking more for EXs, if you have a large budget, you could get one of the Red and Blue Collection Boxes and guarantee yourself an EX, or if you have a slightly smaller budget, booster packs may be the way to go
This battle-ready artifact is hard to get rid of, and the ability to give your spent instants and sorceries jump-start can easily turn the tide in your favor mid-turn
While there is a bit of tension between drawing a filter land and another colorless source or two, they amplify your actual colored mana while fixing for colorless