How about this:
Void Exotic glaive (heavy)
Frame: volatile frame
Exotic perk 1: this glaive no longer puts up a shield but is instead primed for throwing but must have ammo
Exotic perk 2: The throw of the glaive deals more damage depending on the shield charge and the shield charge rate is greatly reduced
Catalyst:
Idea 1: when the shield is at least half charged, the glaive will deal area of effect damage
Idea 2: when the thrown glaive makes contact, it makes nearby enemies volatile
Idea 3: the shield automatically slowly charges but the glaive must be in hand and have ammo
Idea 4: Melee damage also charges the shield