Dio's Dubious Duplicate (homebrew)

Darkness wraps around your form and copies it into a shadowy body. Until the spell ends you create a shadow duplicate of yourself that disappears in darkness.

Your shadow duplicate has many features and can do many different things:

• You can use your bonus action on your turn to command it to move up to 30ft and/or take an action (attack, dash or help). Otherwise it stands there... menacingly...
• Your shadow duplicate has a walking speed of 30ft.
• When your duplicate makes the attack action, it does so with a Shadowblade cast at 2nd level (as this is part of the duplicate itself it doesn't require concentration).
• It automatically becomes invisible when in total darkness.
• In addition, you can, as a bonus action magically swap places with your duplicate as long as it's somewhere you can see.