Jace, Multiverse Architect is a mythic Legendary Planeswalker — Jace card from Reality Fracture Commander (FRC), collector number 1. Current market price: $0.94 (foil $1.07), TCGplayer market prices via Scryfall.
At the beginning of combat on each opponent's turn, they may pay {2}. If they don't, creatures they control can't attack Jaces you control this turn. +1: Draw two cards, then put a card from your hand on the bottom of your library. −3: Exile another target planeswalker or creature you control. Reveal cards from the top of your library until you reveal a creature or planeswalker card. Put that card onto the battlefield and the rest on the bottom of your library in a random order. Jace, Multiverse Architect can be your commander.