Jirina, Dauntless General is a rare Legendary Creature — Human Soldier card from March of the Machine: The Aftermath (MAT), collector number 82. Current market price: $1.43 (foil $0.54), TCGplayer market prices via Scryfall.
When Jirina enters, exile target player's graveyard. Sacrifice Jirina: Humans you control gain hexproof and indestructible until end of turn.