Trillium's Glass Sanctuary

You ward a willing creature you touch from attack. For the duration, any creature who targets the warded creature with an attack or harmful spell must first make a Wisdom saving throw. On a failed save, the attack misses. On a successful save, the attacker is immune to this effect until the start of their next turn. This spell doesn't protect the warded creature from area effects, such as the explosion of a fireball.

If the warded creature attacks another creature or harms it with a spell, that creature becomes immune to this effect for the duration.