Prism, The Light Filter

You may have any number of cards named
Prismite in your deck.
Historic spells you cast cost {2} less.
Tap five Prismites: Until end of turn you may
spend mana as though it were mana of any color.
{w}{u}{b}{r}{g} {t}, Up to five target Prismites
become unblockable until end of turn.