Celestial Gift is an Artifact Set with maximum 5 star rarity in Genshin Impact.

2-Piece Bonus

If the equipping character has completed Witch’s Homework, after they use an Elemental Skill, they also gain “Light’s Guidance” for 20s: All nearby party members gain a 20% Elemental DMG Bonus corresponding to the equipping character’s Elemental Type. The equipping character can trigger this effect while off-field. DMG Bonuses provided by Artifact Sets with the same name do not stack.

 When your party has the Hexerei: Secret Rite effect, Light’s Guidance is upgraded to “Mortal Hymn”: All nearby party members gain a 40% Elemental DMG Bonus corresponding to both the equipping character and the current active party member’s Elemental Type instead. If both characters have the same Elemental Type, these bonuses will not stack.