The Heart of an Old God

{x}: Add X {c}. Activate this ability only once each
turn. The colors you spend to activate this ability
will each have a different effect. For every white
mana, you gain 1 life. For every blue mana, scry 1.
For every black mana, each opponent loses 1 life.
For every red mana, The Heart of an Old God
deals 1 damage to any target. For every green
mana, add {g}.
Before it dispels our magics against it, it shows how
they can be made stronger.