Flask of Cerulean Tears

Flask of Cerulean Tears enters the battlefield with
a charge counters on it.
Remove any number of charge counters from
Flask of Cerulean Tears, {t}: Add mana of any
one color to your mana pool for each charge
counter removed this way.
{x},{t}: Put X charge counters on Flask of
Cerulean Tears. Activate only as a sorcery.