Amulet of the Devout

Wondrous item, uncommon (+1) rare (+2) very rare (+3) (requires attunement by a cleric or paladin)

Description not available (not OGL).
But here is a summary:

Bonus to attack rolls and saving throws of your spells. Use Channel Divinity without expending uses (1/day).
Tasha´s Cauldron of Everything

Amulette des dévots
  1. DnD 5e Magic Items › Amulet of the Devout