Sanctum Lurker is a rare Creature — Horror card from Reality Fracture (FRA), collector number 64. Current market price: $0.88 (foil $1.25), TCGplayer market prices via Scryfall.
When this creature enters, empower Jace 1. Planeswalkers you control aren't put into their owners' graveyards for having 0 loyalty. Planeswalkers you control have "[+2]: This planeswalker deals 1 damage to each opponent and you gain 1 life."