Rise of the Dragons

Sacrifice a Creature when Rise of the Dragons is Cast.
Substract that Creatures Converted Mana Cost from
the Casting Cost of Rise of the Dragons.
{t}: Bury all Non-Dragon Permanents of the
Colour Rise of the Dragons has.
{g}{g}: Rise of the Dragons Becomes Green.
{w}{w}: Rise of the Dragons Becomes White.
{u}{u}: Rise of the Dragons Becomes Blue.
{b}{b}: Rise of the Dragons Becomes Black.
{r}{r}: Rise of the Dragons Becomes Red.
https://f.jwwb.nl/public/n/v/h/temp-cfmplvmawsuopiqnudsf