Adrenaline is a semi-carry/ganker based around an 'energy' mechanic. While he still uses mana, it regenerates at a very rapid pace, and all of his abilities cost a percentage of his maximum mana instead of a flat number. Adrenaline is meant to be prohibited by his 'energy' instead of his cooldowns, so Ability 1 and Ability 2 have 0 cooldown.
Adrenaline is the first victim and soldier of Apex, the True Evil. While Apex possesses a terrifying calm in the midst of genocide and mass extinction, Adrenaline is the physical embodiment of the chaos and fury that rages within the ancient heart of the True Evil.
His sole purpose is to lead The Third Corruption and carve a bloody swath through daemon, man, beast, and god, clearing the way for Apex to establish his presence and begin his final conquest of the known realms.