Resolute Fangs, Golden Bastion

Magic item.

(Legendary Shield)

+8 Armor. Reaction: When you reduce damage from a melee attack with this shield, it may Grapple the attacker regardless of its size (escape DC 20 STR, max 1 creature). Action: Speak this shield’s command word to make it immovable, fixed in place, until it is spoken again.

From Core Rules