Infernal Energy is an enemy-only Potion card with 0 attack and 0 defense.
Card Effect
On Deplete, deal 1 damage to each opponent. Shuffle a random Hellhound NPC from the depletion pile into your deck.
Card Description
"Infernal energy seethed within the bodies of all the demons, from the lowliest imp to the mightiest fiend. It sustained them, much like blood within a human's veins, and powered the portals by which they entered our world." - Lucian the Scholar, 'A Bestiary of the Drake War'