okay then.. I have an idea (even tho it may be quite crappy) a weapon called the
change of heart. A brief description would be the artemis but worn on Dante's head as a helmet and mask, when in use metal wings will stretch out and all the demons under mind control sprout wings of the same design and their chests begin to glow with a white light. (hence the name)
This weapon would have two main abilities the first would be the ability to gain telepathic control over lesser demons and that could be used to make them jump heavy blows from bigger demons or to swarm on the bigger demon to land critical hits. The power would be limited to a few demons as the game would be a little easier if all the demons were put under mind control
Commanding the demons would be simple as when they are temporarily possessed Dante can utter a singe word command using any of the symbol PS2 buttons (triangle attack, square defend me, circle, mass attack, cross Dante utters devil and the triggers are drained)
The second ability would be the ability to prolong the effects of devil trigger by absorbing it from other creatures by draining their souls of it (mass killing like the soul cube) this move as a consequence would drain Dante's life force or something like that.
Acquiring this weapon would involve Dante having to fight the goddess of the weapon she has familiar abilities and the more that Dante uses the weapon the weaker the effects on other demons are if used more then once in the same mission.