Helm of the Dragon

This fearsome helm is constructed from the skull of a juvenile dragon, hollowed and reinforced with bands of bronze. The lower jaw has been removed; the wearer's face peers out from between the upper teeth, framed by the dragon's snout and crowned by a swept-back crest of scales. Each helm is associated with a specific dragon type, and its color and damage type reflect the original dragon's heritage.

When forged, choose one damage type: fire (red), cold (white), acid (black), lightning (blue), or poison (green). The choice is permanent.

While wearing the helm, you gain resistance to the chosen damage type.

Recharge 33%, std action, ranged, cone 3; you exhale a draconic breath weapon dealing medium damage of the chosen type to all creatures in the area. Targets may attempt a Dex save (DC 13) for half damage. Creatures of the same dragon heritage as the helm are immune to this attack.

Once per short rest, when an enemy targets you with an attack of the chosen damage type, you may use a reaction to redirect the breath; you take no damage and the attacker becomes the target instead, using their own attack roll against themselves.