Magda, Brazen Outlaw is a rare Legendary Creature — Dwarf Berserker card from Secret Lair Drop (SLD), collector number 1688. Current market price: $20.60 (foil $22.95), 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.