Jarnbjorn, the Iron Bear

I've decided to stat another Asgardian artifact, this time looking at Thor's weapon he uses during his unworthy phases.

 Jarnbjorn

The powerful axe Jarnbjorn was forged by dwarves and is made of the same magical steel as Mjolnir. The weapon has been blessed with Thor's lifeblood and can cut through virtually anything (including Celestial armor). The axe deals d8 damage and ignores all toughness.