Druidfire

Green fire envelops you and up to 3 other creatures of your choice within range, forming a protective and reactive aura. The flames are harmless to those enveloped and feel cool to the touch. At the start of each enveloped creature’s turn, it gains 2d6 temporary hit points.

When a creature hits an enveloped creature with a melee attack, the aura lashes out, dealing 2d4 fire damage to the attacker.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d4 for each slot level above 4th.