Pentad Zenith

Prismacast (For each color of mana used to cast
this spell its casting cost is reduced by {1}.)
Artifact creature spells have Modular—Sunburst
(This creature enters the battlefield with a +1/+1
counter on it for each color of mana spent to cast it.
When it dies, you may put its +1/+1 counters on target artifact creature.)
Non-creature artifact spells have Sunburst (This
enters the battlefield with a charge counter on it for each color of mana spent to cast it.)