Will of the Jeskai is a rare Sorcery card from Tarkir: Dragonstorm Commander (TDC), collector number 80. Current market price: $6.95, TCGplayer market prices via Scryfall.
Choose one. If you control a commander as you cast this spell, you may choose both instead. • Each player may discard their hand and draw five cards. • Each instant and sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.