Crown of Guilt

The Guilty Crown (ギルティクラウン) is a form of Roxas's Kingdom Key which appears in Kingdom Hearts 358/2 Days. It can be upgraded to the Guilty Crown+ and Guilty Crown++. It appears to be a very Magic-oriented Keyblade, based on all of its Magic-boosting Abilities.

Stats
(Note that all weapons' abilities are obtained by equipping 1 or more Ability Unit(s) to their respective weapon panels)