Mendicant Core, Guidelight (213p) - Planeswalker Stamped

Mendicant Core's 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 . If you do, copy it. (The copy becomes a token.)