Whenever one or more artifact creatures you control deal combat damage to a player, you get (two energy counters). At the beginning of your end step, you may pay one or more . If you do, create an X/X colorless Vehicle artifact token named Nalaar Aetherjet with flying (This creature can't be blocked except by creatures with flying or reach.) and crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.), where X is the amount of spent this way.