Darkmana Spires the Malevolent

Lifelink, Vigilance, Haste, Indestructable
At the beginnig of your upkeep pay {p/b}{p/b}
or Sacrifice Darkmana Spires the Malevolent
{x}{x}{b}{b} you gain X life
{b} untap Darkmana Spires
{t} add {b}{b}{b} you lose 1 life
{t} add X {b} to your mana pool
where X is the amount of life you
lost thlis turn.