Phyrexian Manacoils

{t}, Sacrifice an artifact: Put a mana counter on Phyrexian Manacoils.
{t}, Remove X mana counters from Phyrexian Manacoils: Add X colorless mana.
{t}: Add {c}. Activate this ability only if there are
no mana counters on Phyrexian Manacoils.