Energy Producer

Cards that add {E} energy counters to your pool, the resource that energy decks bank and later spend. Sources span lands like Aether Hub, creatures like Rogue Refiner and Servant of the Conduit, and spells like Glimmer of Genius and Attune with Aether, most handing you {E} on entry or on cast. Distinct from Energy Payoff, which spends stored {E} for effects like pumping or making Thopters, and a broader view than Energy Doubler, which scales output through repeatable triggers on artifacts and permanents you control. Many cards both make and spend energy, so expect overlap with those siblings.