Akara: Lands of Chaos
A Healing Surge allows the player to heal up in the midst of combat.
As an action, a character can use a healing surge and spend up to half their Hit Dice. For each Hit Die spent, the player rolls the die and add their CON modifier to the roll. The character regains HP equal to the total. The player can decide to spend an additional Hit Die after each roll.
Characters cannot spend Hit Dice on a short rest unless there is a character in the party who possesses both the Healing skill proficiency and a healer’s kit.