Alchemize
Alchemize is a rare Silent skill that obtains a random potion and Exhausts for 0 Energy. Potions are consumable items with powerful one-time effects — ranging from Strength Potions, to Poison Potions, to Fruit Juices that permanently increase Max HP. Getting one for free each time Alchemize is drawn is consistent, renewable value that never directly costs Energy.
Alchemize's value scales with potion quality and the number of potion slots you have available. It's particularly strong when paired with Sacred Bark (doubles potion effects) or when your build relies heavily on specific potions. The randomness means some potions will be more or less useful — a Fairy in a Bottle or a Fire Potion is exceptional; a bland Speed Potion less so. Upgraded, it becomes Innate, guaranteeing you get a potion at the start of every combat, providing a reliable lead-in advantage throughout the run.