Loki Laufeyson (Marvel comics)

Loki is a major antagonist of the Marvel universe, sometimes an anti-hero, and his brother Thor's arch-nemesis.

Heroic acts

 * Help Thor to protect Asgard de Surtur;
 * Trying to empower the X-Men by wanting to do a good deed;
 * Working with Spider-Man to free his daughter Tessa Black from the Morwen's demon;
 * Help save Asgard from Void, at the cost of his own life;