Amulet of Devotion

Wondrous item; (requires attunement by a cleric or paladin)
This is made of adimantium and is imprinted with the symbol of Moradin. While you wear this holy symbol, you gain a +2 bonus to spell attack rolls and the saving throw DCs of your spells.
While you wear this amulet, you can cast Planar Ally without using a spell slot. Once this property is used, it can't be used again until the next dawn.