In Greek lore, the myth of the hydra centers around a multi-headed serpent defeated by Heracles (Hercules) as one of his Twelve Labors. Each time Heracles cuts off a head, two more grow back, symbolizing the challenges of facing insurmountable obstacles. The hydra represents the concept of evil or chaos that constantly regenerates, reflecting the struggle against persistent challenges. By ultimately cauterizing the necks after decapitation, Heracles demonstrates the importance of strategy and resilience in overcoming insidious adversities.