Borrowed Time

You touch a creature and channel your inner life force into them. If the target creature has at least 1 hit point, you can spend one of your hit dice, rolling the die and adding your Constitution modifier to the result. They regain hit points equal to the total (minimum of 0).

At higher levels: You can spend one additional hit die on a casting of this spell when you reach 5th level (2hd + CON modifier), 11th level (3hd + CON modifier), and 17th level (4hd + CON modifier).