Nova
Level Required 500
5 Levels per Ability.
Ions: Every 15 seconds regen 1 Ion up to a max of 3. Ions block all incoming damage and are used as charges. Each shot or knife on you reduces an ion by 1. (Ions are balls of light circling the player)
Regen: If health is below 50 Nova will regen 10 health every 3 seconds until a max of 50 hp.
Warped Grenades: Grenades are silent and do 100% more damage.
Charged Up: Each kill gives the player a volt of power. Each volt increases speed by 1% (Does not go away after death)
Wormhole (ultimate) : Go invisible & invincible for 6 seconds, able to move but not shoot knife etc. (Really just an escape ultimate)

I didn't add the different levels and times but thats the maxed version.