From Guild Wars 2 Wiki
Purple Assassins are a purple and yellow garbed type of assassin found inside Super Adventure Box. This variation is not as common as the other two types of assassins and wields a mace like object. It also has more health as well making it the toughest assassin of the three.
- Flail - AoE attack where it spins the mace in the air, knocking down foes. Deals 1 damage.