Immersturm Skullcairn is a uncommon Land card from Kaldheim (KHM), collector number 263. Current market price: $0.25 (foil $0.24), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {B}. {1}{B}{R}{R}, {T}, Sacrifice this land: It deals 3 damage to target player. That player discards a card. Activate only as a sorcery.