I clearly wasnt alone in this line of thinking, because Black Market and Pawn of Ulamog saw an absolute ton of play during Commanders early years, and the former was actually a chase card for a while since its only printing was in Mercadian Masques prior to the release of Commander 2015
Card draw benefits from access to mana
that is, mechanics that only work with other cards that share said mechanic
Then theres the case of giving Mairsil the ability of another notoriously rules-bending variety of artifact: If Mairsil has an equip ability, activating it wont cause anything to happen
Noticing he used all his mana, I use an instant spell to kill the villain on his turn, and a turn later, I play my Cloud card, swaggering with confidence that I turned the tide
Look into my new hat, my former student, and see the truth of the matter. Tawnos moved over and looked over the brim of the upturned miter