Alone

3rd-level enchantment   Casting time: 1 action   Range: 30 feet   Target: A target within range   Components: V, S   Duration: Concentration, up to 1 minute   Classes: Cleric, Sorcerer, Warlock, Wizard   Subclasses:  
You cause the target creature to believve its allies have been banished to a different realm. The target must succeed on a Wisdom saving throw or it treats its allies as if they were invisible and silenced. The affected creature cannot target, perceive, or otherwise interact with its allies for the duration of the spell. if one of its allies hits it with a melee attack, the affected creature can make another Wisdom saving throw. If it succeeds, the spell's effects end.