The Arachnix has the ability to self-replicate itself, creating perfect duplicates. These copies all target the enemies of Black Phantom. It is also capable of firing projectiles and use engergy orbs as a cattle prob or a taser to burn foes.
Breakout Episodes 1 & 2
The Arachnix Drone helped its master get into Hero Factory. Later on in Episode 1, it self-replicated itself to create force fields to keep all of the mission managers, including Nathaniel Zib, hostage.