Cleanse Spirit (Lesser)

When you target a spirit or vessel with this spell who has been corrupted within the last 24 hours, you force it to make a wisdom saving throw (DC 16, -1 for each additional day it has been corrupted). If the target failed their saving throw, you start the ritual to cleanse the spirit or vessel of corruption. Both the caster and the corrupted spirit or vessel will be unable to move for the duration of the ritual. The caster will need to concentrate on the spell for the duration of the ritual. The completion time can be reduced if the spell is cast using a spell slot instead (18 seconds when cast at level one, 12 seconds at level 2, 6 seconds at level three). If the spell is completed without interruption the spirit or vessel will be cleansed. A cleansed spirit or vessel can no longer be corrupted after having experienced this ritual.

The spell can be cast as a ritual (char mod+½ level) per short rest, or can be cast using a spell slot.