Consecration

Rifts of golden light appear on the ground in a 15-foot radius within range, illuminating the area with dim light. While the spell lasts, creatures within the area gain a +1 bonus to AC and saving throws against the attacks and abilities of undead creatures. In addition, undead creatures that enter the area or start their turn there take 1d10 radiant damage. A successful Charisma saving throw reduces the damage by half.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the radiant damage increases by 1d10 for each spell level above 2nd.