The Clasp of Helm is an amulet in Baldur's Gate: Siege of Dragonspear.
It's dropped in the battle with the Shambling Mound.
Description[]
“ | Those who revere Helm, the Watcher, often carry his mark engraved on a necklace, brooch, or ring. While many of these items are simple reminders that Helm is ever vigilant, some items bearing the god's mark also grant their bearer a modicum of protection. | ” |