the great canyon

The great canyon enters the battlefield
tapped, pay 3 life or the great canyon is destroyed.
{t} : add {u}{u}, or {g}{g} to your mana pool
{t} : add {c} to your mana pool
{t} : add {g} to your mana pool
{t} : add {5} to you mana pool, destroy the
great canyon and pay 5 life.