Immersturm Skullcairn [Kaldheim]

Immersturm Skullcairn enters the battlefield tapped.
{T}: Add {B}.
{1}{B}{R}{R}, {T}, Sacrifice Immersturm Skullcairn: It deals 3 damage to target player. That player discards a card. Activate this ability only any time you could cast a sorcery.