Powers: He is unstopable. Even if he doenst have Nemyon's invulnerability, it is also very hard to damage, and alongside his endurance, he is also incredibly strong, a real monster. His attacks are mostly based in fullbody charges, like an stampede of one man, wich, thanks to his blades and massive body, are pretty dangerous.
Weapon: "Ares"- A hammer-axe shaped in the form a wild boar. It is used to make lot of damage, due to being both a blunt and a cutting weapon all in one. Named after the gor of war who was able to transform into a Wild Boar.
Weakness: Ice based attacks. His body seems to be get slower at extreme cold. It wont kill it, but will stop it, making him impossible to perform his most powerful attacks. ---------------------------------------------------------------------------
The Lernean Hydra was his second task, that's the pinkish one with the sickles in this series. Heracles' final task was capturing Cerebrus, but he was killed when his wife was tricked into giving him a poison soaked robe. The poison was either Hydra poison or centaur blood, I can't remember which.