Ria Ivor, Bane of Bladehold is a rare Legendary Creature — Phyrexian Knight card from Phyrexia: All Will Be One Promos (PONE), collector number 214s. Current market price: — (foil $0.52), TCGplayer market prices via Scryfall.
Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.) At the beginning of combat on your turn, the next time target creature would deal combat damage to one or more players this combat, prevent that damage. If damage is prevented this way, create that many 1/1 colorless Phyrexian Mite artifact creature tokens with toxic 1 and "This token can't block."