From Pathfinder Book of the Dead, which isn't enabled.

Ensnaring Wrappings

FEAT 10

Activity reaction

Archetype Mummy

Prerequisites Mummy Dedication; expert in Athletics

Trigger Your Strike deals physical damage to a creature that is within reach of your arms and isn't more than one size larger than you.

Some of your wrappings come loose to ensnare a creature you recently damaged. You attempt to Grapple the creature you damaged.

Pathfinder Book of the DeadOGL