MJOLNIR'S POWERS
TRANSMUTATION
With the aid of focusing and calibration by Iron Man's Bleeding Edge Armor, Mjolnir unleashes a torrent of divine transformative energy to reverse the transformation that High Evolutionary and Diablo, the Master of Alchemy, render on the Destroyer armor. The transmutations actually affect Thor and Iron Man as well, from Iron Man/Thor #4:
On a far smaller scale, Mjolnir demonstrates its transmutation powers by rearranging the molecules of his outfit to create his armor, from Thor #617:
MISCELLANEOUS ABILITIES
Despite being bereft of the Odinforce, Thor manages to summon forth his stepbrother, Loki, and restore him from death. At first, Loki returns in the form of a boy named "Serrure," which is French for "Lock." When Serrure grasps Mjolnir, Thor restores Loki's godhood (mostly), from Thor #616-17: