Taimi, Mechanical Genius

Whenever one or more artifact creatures you control deal combat damage to a player, you
get {e}{e} (two energy counters).
At the beginning of your end step, you may
pay one or more {e}. If you do, create an X/X colorless Vehicle artifact token named Nalaar Aetherjet with flying and crew 2, where X is
the amount of {e} paid this way.