Mirage, Blue Speedster

Mirage, Blue Speedster power is equal to the number
of artifacts you control.

Start your engines! (If you have no speed,
it starts at 1. It increases once on each of your turns
when an opponent loses life.
Max speed is 4.)
Max speed — Whenever you cast an artifact
spell, you may pay {1}. If you do, copy it.
(The copy becomes a token.)