Embrace

You pull a willing creature within range into a tight, comforting hug. 

The target gains 100 temporary hit points, and radiates an air of tremendous determination in a 100 ft. radius sphere, centered on them. Whenever the target makes an ability check, attack roll, damage roll, or saving throw, they can sacrifice temporary hit points granted by this spell to give themselves a bonus to their roll equal to twice the number of temporary hit points spent.

The maximum number or temporary hit points that can be spent at a time is 10 (for a +20 bonus).