Urn of King Terenas

Urn of King Terenas enters the battlefield with
a number of charge counters on it equal to the
number of blighted lands you control.
{t}: Add {c} to your mana pool for each charge
counter on Urn of King Terenas.
If your life total would become less than 1,
instead remove all charge counters from this
card and sacrifice it. Your life total becomes
equal to the charge counters removed this way.