Get more emotional, and with that emotion comes magic powers that you can use to kill people that gave you the emotion in the first place.
Refer to: Achilles. A goddess gave him his immortality. As he realized his invincibility and strength, he grew less respectful towards everyone, including the gods. He let his emotions control him, and shows extreme selfishness towards the ones who gave him the powers in the first place.
When do we have Mythology class? I'm totally ready.