X, the Y of Z

If X, the Y of Z was cast using mana
from a colorless source, it enters the battlefield
tapped with a number of stun counters
equal to the amount of colorless mana spent.
{w}{u}{b}{r}{g}: X, the Y of Z gets +X/+0
where X is the number of basic lands you control.
If X, the Y of Z is untapped, your basic lands
untap during each player's untap step.