Sanctum of Eternity [Commander 2019] noPrice if Krovikan Horror is in

if Krovikan Horror is in your graveyard with a creature card directly above it

and/or planar invasion

Set: Conspiracy Type: Artifact Creature — Construct Rare Cost: {4} No more than one creature can attack each combat

Saffiyah clapped her hands and twenty flying men appeared at her side

Set: Prerelease Cards Type: Legendary Planeswalker — Kaya Uncommon Cost: null Your opponents and permanents your opponents control with hexproof can be the targets of spells and abilities you control as though they didn't have hexproof

Sanctum of Eternity [Commander 2019] noPrice if Krovikan Horror is inSet: Commander 2019 Type: Land Rare Cost: {T}: Add {C}. {2}, {T}: Return target commander you own from the battlefield to your hand. Activate this ability only during your turn. Come and rest here, beyond the constraints of space and time.