The Demonic Wishing Eye looks like a giant medallion necklace with a red (green in "Reign of Gunters") eye at the center that the Ice King wears around his neck. He claims that his future wife may be marrying him to gain control of it in "When Wedding Bells Thaw." He keeps it on his neck near the Ghost pouch
Powers and Stats
Name: Demonic Wishing Eye
Origin: Adventure Time
Powers and Abilities: Reality Warping, mind control, cloning
Wielders: Gunter, Ice King
Attack Potency: Varies according to the wish, but Gunter made clones of himself capables of defeating Finn and Jake with ease (so around Large Building level), now imagine several clones of the Ice King or worse clones of The Lich!