Heres some ideas i had

1. Something that when put on the dark pedestal makes it act like a turret
   Or
   A dark turret that can do diffrent attacks depending on whats on it

I do recall there are 2 items that acts as a sort of turret. One with lightning, the other with arrows.

Then perhaps a multi block structure, exemple MK3 energy collector at bottom, pedestal at the center, and a vanilla dispenser on top and activated with a star depending on the tier it will change the energy capacity or/and attack power. It could have a white and black list. Unlike normal pedestal it can attack players.