The Wasp Emitter is a Hardmode trap sentry weapon. It releases wasps once every 30 frames in a random direction. It has a 33% (50%) chance of being dropped by Plantera. It is effectively an upgraded Bee Emitter.
This weapon benefits from the player's sentry speed, able to fire faster than its default firing speed.
Its best Modifier is Ruthless. The Mythical modifier provides the widest array of stat bonuses, but these primarily affect the initial summon rather than the sentry's damage. Additionally, sentries cannot deal critical hits under normal circumstances. The only significant advantage a Mythical Wasp Emitter has over a Ruthless one is knockback.