Bouts of Slumbering.

Failing a wisdom save of the casters spellsave DC. The target creature becomes prone to spontaneously sleeping once every 1D8 hours. Rerolling the spell save DC every time the sudden sleeping happens to prevent from suddenly falling prone however target creature will remain sleeping standing up. Affected creature if falling forward prone to this spell effect takes 1d4 blunt damage and falls into a heavy sleep for 30 minutes.15 minutes standing up. If Target is left alone and is unaffected by damage. Target creature receives + 1D4 health upon waking up from spontaneous sleep.

The spell effect remains onto the target creature unless dispelled, the remove curse spell, or successfully made five wisdom difficulty checks against the spellsave DC.(Against falling on the ground and passing out stronger)