Inseparable

You and another creature who takes this feat begin to act as one. When taking a turn in combat you both take your turns at the same time, being able to split up all actions on your turn between the two, enabling you to make difficult maneuvers such as tabletop operations and coordinated attacks at the same time. When rolling for initiative take the higher roll of both creatures.

You also gain access to the spell Warding Bond. If you are not a spellcaster, you may use this spell once between a long or short rest.