Beckoner of the Eternities

Emerge {5}{w}{u}{b}{r}{g}
You may spend mana as though it were mana of
any color to cast spells or activate abilities of
cards you own, and you may cast them from any-
where. Spells you own have Emerge {x} where X
is that card's converted mana cost minus one.
Whenever you cast Beckoner of the Eternities or
another spell for it's emerge cost, each opponent
sacrifices a permanent.