Curse of Reverse Invisibility.

Failing to cast the invisibility spell or saying the spell backwards the caster must roll a disadvantage wisdom save of their own spell save DC. Or be affected by the following condition. 

The caster is visible admits a bright light for 120ft sphere and has disadvantage on stealth checks. The caster cannot see any other living creature except undead, constructs, and aberrations. Allies within the 120 ft sphere of the caster become invisible while remaining in the casters light although being visible to undead, constructs, and aberrations.