Adrenalin Surge (MM)

With this spell the spellcaster boosts the recuperative power and physical prowess of a humanoid touched for the duration.  While in effect, the target can expend a single hit die as a bonus action each round to gain temporary hit points equal to the roll plus their constitution modifier. For the duration of the spell, targets also gain +10' to their movement, +1d4 to damage rolls with melee attacks from natural or wielded weapons and +1d4 on Dexterity, Constitution and Strength saving throws.  If a target has expended all of their hit dice, temporary hit points can not be gained, but all other bonuses apply.  For the purpose of this spell, NPCs are considered to have a number of hit dice available for this skill equal to 1/2 the hit dice shown in their stat block, using their hit die and constitution modifier to determine temporary hit points received.  At the end of the spell, all effected creatures are stunned for one round.  For each spell slot above 4th used to cast this spell, the wizard can effect one extra humanoid within range.