Mishra's Command is a rare Sorcery card from The Brothers' War Promos (PBRO), collector number 141p. Current market price: $0.29 (foil $0.72), TCGplayer market prices via Scryfall.
Choose two — • Choose target player. They may discard up to X cards. Then they draw a card for each card discarded this way. • This spell deals X damage to target creature. • This spell deals X damage to target planeswalker. • Target creature gets +X/+0 and gains haste until end of turn.