Aetherflux Conduit

Fifty energy is a fortune, and that number is the whole design problem this card sets out to solve. Energy has historically been a slow-drip resource: you gained it two or three at a time and spent it on incremental value, because a big battery had no engine fast enough to fill it. Here the fill rate is tied to raw mana spent, not to a fixed trickle, so every expensive spell you resolve is deposited back into the reservoir at full weight. The activation is the payoff most decks build toward from the other direction: draw seven, then dump the hand for free. That last clause hides a real design constraint. The energy trigger counts mana spent, and the spells you cast off the activation are cast without paying their costs, so they deposit nothing back into the battery. The engine does not refuel itself on the way out; it refuels itself on the way in. To reach fifty again you have to spend real mana on the seven fresh cards you drew, which anchors the loop to how much mana you can generate per turn rather than to how many free spells you can chain. The lineage runs through every "cast your whole hand for free" payoff the game has printed, but routing it through an accumulating counter rather than a spell count changes what you build around. You are not chaining cheap spells to raise a number; you are spending big to bank big, then cashing the bank all at once, with the tap symbol as the only real brake.