destroyer of worlds

cannot leave the battle field
{t}{b/g}{b/r}{g/u}{g/w}{r/g}{r/w}{u/b}{u/r}{w/b}{w/u}:target
opponent must pay{p/b}{p/b}{p/b}{p/c}{p/c}{p/c}{p/g}{p/g}
{p/g}{p/r}{p/r}{p/r}{p/u}{p/u}{p/u}{p/w}{p/w}{p/w}
{t}:target player gets{p/b}{p/c}{p/g}{p/r}{p/u}{p/w}
as anadditinol cost to this spell, pay{5}{p/b}{p/b}
{ut}:lose 20 life
only 1 destroyer of worlds can be on the battle field