Amulet Of The Arcanist (PT)

This  amulet bears several arcane magical symbols. While you are wearing this silver medallion, you can use it as a spellcasting focus for your wizard spells, and you gain a +2 bonus to spell attack rolls and to the saving throw DCs of your wizard spells.

Notes: Bonus: Spell Attacks, Bonus: Spell Save DC, sorcerer. warlock, or wizard