Cloak from Undead

You create an invisible necromantic field to hide and protect the target from undead. One target creature becomes invisible to undead creatures and resists necrotic damage. Additionally, the target has advantage on saving throws to resist any harmful effects of the Shadowfell or the Negative plane. This spell is broken the moment the target attacks an undead creature or uses a spell or power that affects any undead creatures (such as a cleric or paladin using their channel divinity feature to turn undead). Other attacks, spells, or abilities do not break this spell so long as they do not target undead.