The Tavern

I propose a new unique spriggan: the faerie queen. She leads a pack of killer butterflies. Compared to a butterfly, a killer butterfly has +10 damage and batlike movement. She can cast: blink range, portal projectile. She is armed with a high enchantment or randart sling.

Give her a smite attack and let one of her spells be "summon hostile butterflies" which spawns hostile (normal) butterflies centered on the user for that totally locked-down experience. Oh and give her access to Dimensional Anchor too.

new monster: BUTTerfly. its like a butterfly but it has butt cheeks instead of wings

Killer butterflies is actually a misnomers.
I can't believe it's not butterflies.

Would there be a big difference between introducing killer butterflies and renaming ravens?

We'd lose that awesome raven description