Constriction

Hyperconstriction, also known as Hypergrip, is the ability to constrict objects or subjects with superhuman appendages. One with this ability does not necessarily have Superhuman Strength, but instead is gifted with the presence of limbs (perhaps a tail, arms, legs or hands) which have muscles capable of contracting and constricting any subject until they are asphyxiated or simply restrained from moving. One with this ability could sometimes even constrict or crush objects using only their hands.