Mobile Solar Station

Vigilance
Lands you control with sun counters tap for an additional mana of any color they can produce.
{2}{w}{g}, {t}: Put a sun counter on up to two target
lands you control.
{2}{u}{r}, {t}: Create a red and blue Elemental
creature token with power and toughness equal to
the number of lands you control with sun counters.
When the Conclave commissioned League guildmages
to experiment with drawing power from sunlight,
they really should've forseen this outcome.