Tomb of the Everwinter

Globes of ice entrap those within them, exposing them directly to the raw force of the Everwinter at four different points you can see within range. Each creature in a 40-foot-radius sphere centered on each point you choose must make a constitution saving throw. The sphere spreads around corners. A creature takes 20d6 cold damage and 20d6 necrotic damage on a failed save, or half as much damage on a successful one. A creature in the area of more than one glacial tomb is affected only once.

Bodies of creatures killed by this spell are frozen and decayed down to just their bones.