Double

This spell transforms the caster or a creature that the caster touches into a double of the other. An unwilling creature being transformed must make a Wisdom saving throw to avoid the effect. The spell has no effect on a shapechanger or a creature with 0 hit points.

The transformation lasts for the duration, or until the target drops to 0 hit points or dies. The transformed subject’s game statistics, including mental ability scores, are replaced by the statistics of the replicated individual  It retains its alignment and personality.

The tranformed assumes the hit points of its new form. When it reverts to its normal form, the transformed returns to the number of hit points it had before it transformed. If it reverts as a result of dropping to 0 hit points, any excess damage carries over to its normal form. As long as the excess damage doesn't reduce the creature's normal form to 0 hit points, it isn't knocked unconscious..

 If targeted as well the transformed’s gear melds into the new form. The creature can't activate, use, wield, or otherwise benefit from any of its equipment. If the gear is not included in the targetting of the spell then it remains unchanged and only the flesh is changed.This May result in ill fitting gear.