Seal an ally within range in a protective sphere of holy force. They are paralysed while within the sphere, but immune to all damage and effects that target them. At the start of each of their turns within the sphere, they regain 2d6 hit points.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the healing per round increases by 1d6 per slot level above 3rd.