7 8 9

Devour {x}: Add X colorless mana to your mana
pool until end of turn where X is equal to the
converted mana cost of creatures devoured this
way. This mana can only be used to play spells
or activate abilities with a 6, 7, 8 or 9 in it's
mana cost or text.
"Cause Seven ATE Nine! Oh c'mon, that's
HILARIOUS!"