Mana's Origin

{t}: Add one mana of any color to your mana
pool.
When Mana's Origin is tapped for mana add another mana to your mana pool. (Ex: {t} for
{u}, then next turn {t} for {b} and add {u} to your mana pool, and so on.)
Mana's Origin deals 1 damage to its controller
for each mana not used.