You twist the elemental properties of a spell, breath weapon, or other effect utilizing elemental energies to shift from its current element into another. The creature causing the triggering spell or effect (such as a red dragon’s Fire Breath, an ankheg’s Acid Spray, a kraken’s Lightning Storm, the cone of cold spell, or similar) must succeed on a Charisma saving throw or the damage the effect deals changes to one of the following damage types of your choice: acid, cold, fire, lightning, or thunder.