Urvan was the axe used by Greil after he had cut the tendons in his sword arm. In the last parts of Radiant Dawn, Caineghis passes the axe back to Ike, which had been previously used as a marker of Greil's grave.
Urvan is the most powerful axe in Fire Emblem:Radiant Dawn and Path of Radiance. In Fire Emblem: Radiant Dawn, it sat as one of the 11 SS-ranked weapons, alongside Vague Katti, Alondite, the Wishblade, the Double Bow, Baselard, and the tomes Rexaura, Balberith, Rexflame, Rexbolt, and Rexcalibur.