Magus of the Will is a rare Creature — Human Wizard card from Commander 2016 (C16), collector number 14. Current market price: $0.31, TCGplayer market prices via Scryfall.
{2}{B}, {T}, Exile this creature: Until end of turn, you may play lands and cast spells from your graveyard. If a card would be put into your graveyard from anywhere this turn, exile that card instead.