The Spells
The Spells concept is basically a re-theming of another idea posted on the Dominion Strategy Forum. User "LittleFish" had an idea he called "Songs." User "LibraryAdventurer" elaborated on the idea and created cards he actually printed out and played with. Spells are derived from those cards. I tried to make sure to expand the idea into something more fleshed out by including new ways to get the Spells, way more Spells, and a new method to play them (since most are terminal).