once per long rest you can use an action to switch to your second character sheet for five turns, you gain some occult looking markings across your entire body and anyone in a 15 ft radius has to make a WIS save (dc 10) when failed they gain the frightened effect.

Any damage taken is shared between you both, as you share the same body, because of this you will also be the same level and share the same spell slots although you can pick a different race variant.

you will also only have 1 total amount of subclass unique spells (for example, if ur subclass gives 2 u can allocate those 2 between 2 sheets), and every time you gain new spells u can re-allocate the spells (even that one sheet gets 1 spell, or all lower level subclass spells, while the other sheet gains more/ the higher level spells, as the level does not matter for a subclass unique spell)

If you want to turn back in that time you have to roll a CON save (DC 5) with advantage, after that you lose advantage and for every next 5 turns the difficulty increases by another 5, however if you roll a 20 you automatically succeed, however if you fail the roll you cannot roll until the turn after the next, when you return to your own body you gain disadvantage on your next attack and lose your actions and bonus actions of that turn.

You will also have to roll a CON save (DC 5) whenever you experience a "bad" emotion (examples being sadness and anger), if you fail this saving throw you get disadvantage on your next roll, if this happens in combat you will instead turn and the return DC will start at 10 instead (still with advantage)