You you create an exact duplicate of yourself in an empty space you can see within 30 feet of you. When you cast this spell at the start of each of your turns for the duration, you can switch places with your duplicate.
The duplicate has all of your stats, abilities, and equipment (including magic items). It acts on your initiative, and has its own actions, though it shares its concentration on this spell,and if either of you lose concentration, the spell ends.
Your current hit points are divided between you and the duplicate and shares all other resources and abilities with you (including limited use magic items), with any usage by either you or the duplicate depleting the resource for both of you.
Your duplicate can take any action you can take, but it can deal a maximum of 15 damage on its turn (any additional damage dealt deals no further damage, when dealing area of effect damage, damage is split between all targets equally up to the maximum).
If either you or the duplicate is reduced to zero hit points, the spell ends and you become the copy that was not reduced to zero hit points. When the spell ends, if both you and the duplicate are still present, decide which is you, and the other vanishes. Anything that was copied during the spell has the copied version vanish.