Ye Ole's Humdrum

Your words and action are laced with dulling enchantment that convinces nearby foes you pose no threat. Choose any number of hostile creatures within range that can see or hear you. Each of those creatures must succeed on an Intelligence saving throw or be Charmed by you until the spell ends. While Charmed, the creature regards you as harmless and will not take any actions that would harm you. Although, the creature remains aware of its surroundings and will act normally toward others.

When you cast this spell, you set a trigger. It could be a verbal command, or a specific circumstance you define. When the trigger occurs, the spell ends for all affected creatures. The spell also ends when you deal damage to it, or it sees you harming one of its allies.