Prismatic Crystal

Prismatic Crystal comes into play tapped unless you control an Artifact Land.
• {t}: Add {c} to your mana pool.
• {r/w}, {t}: Add {r} or {w} to your mana pool.
• {u/b}, {t}: Add {u} or {b} to your mana pool.
{bull} {c}, {t}: Add 1 mana of any color to your
mana pool.