Badge of Familiar's Shared Pain

These badges are stamped with the image of your patron. They are identical aside from one being significantly smaller than the other.

These badges have one charge. Once per long rest when your familiar takes lethal elemental damage, you can expend a charge so that the damage is instead transferred to you and rather than being destroyed, your familiar disappears from the current material plane and loses access to its current form. 

It can be brought back as an action in a different form you decide as outlined in the pact of the chain feature. It regains access to the lost form after a long rest and the badge regains its charge on a long rest.