Good vs Evil

Give your creatures X +1/+1 counters, where X
is the number of white mana used to cast this
Destroy X non-land permanents, where X is
the number of black mana used to cast
this
"Yes, sooner or later - later, if he is strong or
well-meaning to begin with, but neither strength
nor good purpose will last - sooner
or later the Dark Power will devour him."