Swaps must be equal: if you bring in 3 cards, you must take out 3 cards
Later, GX cards arrived with powerful attacks, and V cards continued this trend in the Sword & Shield era, often paired with VMAX and VSTAR versions large, high-HP cards with alternate artwork
Wastes is not a basic land type, this does not count towards any domain abilities
Since its a cast trigger, that spell doesnt have to resolve to get the energy, but that means you cant get it from other artifacts just entering the battlefield
He punishes you (or your opponents) every upkeep, but he also opens up lines of play that most other Commanders cant match
If one of them is in your opening hand, you can slam it down in play before the game even starts