Entropy's Edge/Disarray's End

Disarray's End is a unique Hardmode that is rewarded by  when speaking to her after defeating her a total of 50 times. It possesses two modes of use: When striking an enemy, 25% and 100% of the enemy's effective defense is added to the damage of the dusts and dagger respectively. All of Disarray's End's projectiles inflict the debuff for 6 seconds.
 * Left-click causes a non-piercing and gravity-defying dagger to be thrown. The dagger slows down to a stop before exploding into a ring of homing Hallowed Dusts which each deal 20% of the weapon's damage. If the dagger strikes an enemy before stopping, it will release the Dusts anyway.
 * Right-click causes a spread of three homing Hallowed Dusts to be thrown, with each one dealing 70% of the weapon's damage.