Powertsone Land

{t}: Add {c}
{4}, {t}: Create a colorless Powerstone Shard
artifact token with: "{t}: Add {c} for each artifact
you control named Powerstone Shard."
When Teferi discovered a place made of powerstone,
he was overwhelmed by the light and colors of the
place.The rays allowing the evolution of nature in
this place as beautiful as strange ...