Amethyst Sanctuary

You create a shimmering sanctuary in a 15-foot radius around you. While in this area, allied creatures have advantage on saving throws against fear and blighted effects. Additionally, the first time a creature within the sanctuary takes damage from a blighted source, they take no damage and instead gain temporary hit points equal to your spellcasting ability modifier.

At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, the radius increases by 5 feet for each slot level above 2nd.