Aether Refinery

If you would get one or more {E} (energy counters), you get twice that many {E} instead. {T}: You get {E}, then you may pay one or more {E}. If you do, create an X/X black Aetherborn creature token, where X is the amount of {E} paid this way.

Avaati Vya's invention stabilized raw aether, but even she didn't know it would also create life.