Burn 10: Do 10 unavoidable damage to a Hero. Use no more than three times per round.
Spend all your Energy to permanently increase the Power Strength of any power in the game by 10.
Until your Hero is defeated, the Energy totals of each of your Sidekicks, Pets, etc. cannot be lowered past Undying Loyalty's Power Strength by any means, including any Powers causing instant defeat. If Undying Loyalty's Power Strength is above the starting Energy of an ally, that ally instead starts with Energy equal to Undying Loyalty's Power Strength.
At the start of each round, gain 5 Energy for each Attack that targeted you last round.