Super nova has one abillity that is unlocked at all times.

The big bang.

Charges for 3 seconds then fires 5 global area of effects blast about the size of Gp ult dealing 1000 magic damage (+ 200% bonus AP) and 1000 physical damage (+ 200% bonus ad) on hit Slows all enemys hit by 50% for 5 seconds after that fears all enemys hit for 2 seconds Stuns all enemys hit after the fear for 2 seconds then reduces the magic resist, armour of enemys before they are hit by 100.(all of these effects also effect allies hit counts as kills)