Memory Veil
Necrotic Spell, Tier 3, Secret
Concentration: As long as the caster remains conscious. Conceal or change all memories of an event for up to 12 creatures within 2 spaces on a failed WIL save for as long as this spell lasts.
Why is this secret? This can have profound ethical and narrative implications. Often used by shadowy organizations or rulers to cover up secrets best left buried.
From Game Master's Guide