Tazri, Stalwart Survivor is a rare Legendary Creature — Human Warrior card from March of the Machine: The Aftermath Promos (PMAT), collector number 6p. Current market price: $0.50, TCGplayer market prices via Scryfall.
Each creature you control has "{T}: Add one mana of any of this creature's colors. Spend this mana only to activate an ability of a creature. Activate only if this creature has another activated ability." {W}{U}{B}{R}{G}, {T}: Mill five cards. Put all creature cards with activated abilities that aren't mana abilities from among the milled cards into your hand.
All March of the Machine: The Aftermath Promos cards and prices