Crystal Skull, Isu Spyglass Crystal Skull, Isu Spyglass opens your eyes to your decks hidden tech
In a game of Commander well, thats gonna be a gigantic construct
Most of your characters have good stats for banishing their rivals in challenges, and if they don't there are easy ways to pump them up, either with a song, or as the side effect of a song
Don't focus too much on the expensive activated ability
You can set up the general context of the call ("I'm in a Magic game and I need someone outside the game to make a choice"), but you shouldn't explain anything that's going on in the game or what the consequences of their choice may be
Not only that, but if I pass an Olivia Voldaren, I'll know (with relative certainty) that the player to my left will move into red-black to be able to play her