Time in a Bottle

You prepare to shift the flow of time around you. For the duration of this spell, you may use your reaction when a creature you can see ends their turn to activate it. 

When activated, you briefly stop the flow of time for everyone but a target creature of your choice within range. No time passes for other creatures, while the target takes a turn without affecting the initiative order. They can use actions, bonus actions and move as normal. All creatures except the target will automatically fail Strength and Dexterity checks and saving throws during that turn.