Artifact, 3 (3) {T}: Add one mana of any color to your mana pool. {T}: Put a charge counter on Coalition Relic. At the beginning of your precombat main phase, remove all charge counters from Coalition Relic. Add one mana of any color to your mana pool for each counter removed this way.
Illus. Donato Giancola
The main use for the second ability is to tap it on your opponent's turn, to untap during your untap so it is untapped, and you get one mana during your next main phase plus you can tap it again and effectively get two mana from it. [D'Angelo 2007/05/15]
If it has more than one counter, you can choose a color mana for each counter separately. [Future Sight FAQ 2007/05/01]
The "precombat main phase" is the first main phase of the turn. [Future Sight FAQ 2007/05/01]
Future Sight
(Rare)