Nefradrox Blessings

{p/r},{p/b}, (can be paid with either {r},{b} or 2 life)
{x}, {t} (target Creature(s) are exiled depending on
{x} amount of mana given, in return caster must
pay life equivalent to the mana cost of the top
card of your library.
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"making a deal with a demon seems too mundane"