Communal Protection (Remnant)

You cast a shower of diamond dust upon a crowd of up to 20 creatures within a 30 ft radius of a point you choose within range, granting them resistance to one damage type of your choosing for as long as the spell persists. A creature’s maximum hit points must be equal to or less than half of your maximum hit points for this to take effect. 

At Higher Levels. When you cast this spell using a slot of 5th level or higher, you may choose an additional 10 creatures for every level above 4th.