Magda, Brazen Outlaw is a rare Legendary Creature — Dwarf Berserker card from Kaldheim Promos (PKHM), collector number 142p. Current market price: $12.70 (foil $9.17), TCGplayer market prices via Scryfall.
Other Dwarves you control get +1/+0. Whenever a Dwarf you control becomes tapped, create a Treasure token. Sacrifice five Treasures: Search your library for an artifact or Dragon card, put that card onto the battlefield, then shuffle.