Duribg Act 5: Mama, you'll gain a cuff upgrade.
This upgrade allows you to cut the unbilical cords of BTs. During the escort of Mama to Mountain Knot City, you'll come across a couple of BT areas. Sneak around and keep an eye on BB's tracking beacon. When it is facing up, you're directly underneath one. Press Square when prompted to cut the cord.
The trophy unlocks, but you must escape a wolf-like BT.
Note: Don't forget to gold R1 when you're close to hold your breath to get close enough to the BT in the first place.