Alia's Ultravitality

Channel primeval magical currents into your palm, granting yourself or a target creature a profound new sense of vitality and endurance with your touch. Any time a target creature under this spell's effects is given Temporary Hit Points, those Hit Points will add onto any current Temporary Hit Points the creature possesses, instead of replacing/being replaced by them. Additionally, if a creature under the effects of this spell is healed and they are healed past their Hit Point maximum, any additional Hit Points are changed into Temporary Hit Points and given to the healed creature. Temporary Hit Points given by the same spell, ability or feature do not stack with each other and replace each other as normal.