Quon, Ancient Whisper

Spectrochromatic: (You may pay all instances of {w} mana with {c} mana instead when casting
this spell.)
{1}{w}/{c}: This creature phases out until the end
of the turn. Only trigger this in non-combat phases.
{7}: You may cast spells from exile, their mana
cost can be paid by any color this turn. Spirits
you control have "{t}, add {c} mana" this
turn.