(Damage causes loss of life.) Sometimes the most obvious answer is also the right answer
Still, in Commander, flexibility is king
You have to choose a nonland permanent, which means thats on the board somewhere - you cant just name any card in MTGs history like with Pithing Needle or Sorcerous Spyglass, though those dont stop mana abilities, which Scheming Fence does
In a competitive format, you need to worry about both the tournament structure and the metagame
Royal WardenRoyal Warden makes two token when it enters the battlefield and fits very well in the reanimator framework of the deck and can even unearth itself in a pinch
This decklist also runs equipment with high equip costs like Argentum Armor and Excalibur, Sword of Eden, as you can bypass the cost thanks to Captain Americas ability