Megalomania

Megalomania is a of mind.
 * When triggered, All player attributes are falsely increased when displayed. The narcissistic character considers himself flawless and therefore is inclined to overstate his real abilities.
 * Physical, mental and magical debuffs (except for injuries and psyche states) become hidden. Such flaws are way too insignificant to be concerned about.

the activation chance increases due to successful hits (especially critical ones), killings of multiple enemies and leveling up. Misses and fumbled attacks reduce the chance.