Granger's unique Demon Hunting Gun and Cannon are powered by Demonic Energy. Both his weapons start with 800 max Energy. His Gun restores 8% Energy per second while his Cannon restores 2% Energy per second. Killing a Minion / Creep permanently increases their max Energy by 6 / 6, and instantly restores their Energy by 5% / 5%, respectively. Each kill or assist on an enemy hero permanently increases both weapons' max Energy by 12 and instantly restores 10% Energy.
Every 1% Cooldown Reduction converts to 2 Physical Attack. Demonic Energy costs are not affected by Energy Cost Reduction.