My party as part of the scenario have to catch a doppleganger villain alive to.bring back for questioning. They have encountered and defeated the doppleganger and hog tied it. Now they face the final.boss but they may leave the doppleganger on its own while they fight. While they ate distracted could the doppleganger.assume the form of a gnoll and chew thru the ropes? It can only stay a medium size so it can't shrink small and slip thru the ropes but reading the description in.the monster manual it could take the shape.of any.humanoid. so it could take the shape.of a choker and slip.out with its tentacles limbs or take a form to chew thru the ropes?