Collar of Neffis

Wondrous item, common (requires attunement by a warlock)

The necklace is made of polished flat obsidian beads, each with three prongs. When adorned the prongs bite into your flesh, causing no damage but preventing the item from moving.

While you are wearing it, you gain the following benefits:

• You can use the amulet as a spellcasting focus for your warlock spells.
• As an action, you can ask for guidance from Neffis. You gain advantage on a single intelligence check made within the next minute. Once you use this property it can't be used again until the next dawn.