Roygbiv is a tavern at the end of the rainbow. As it is hard to reach, only wizards generally gather there. Whenever there is a dispute among wizards, there is - of course - only one way to resolve this: a magical fight to the death.
Team up with friends (or don't) and cast spells at each other until the first offending wizard has perished. Choose from 7 archetypes with each 12 unique and themed spells. Build your initial deck, and pick up new spells to stop enemy strategies or expand on your own, as you play.
Cast magic missiles, boost your allies' spells and suppress those of your opponents. Summon lightning totems, goats or obese wisps. Swamp your foes in dark magic or drain them from their life force. Gain spell power to increase your strength, or cower behind a barrier.
Start the game by choosing a wizard (this gives you a unique ability, and choice from a specific set of cards at the start). Then, pick your spell cards to assemble your deck. Take turns to gain mana, cast spells (paying that mana) and pick up new spells (unrestricted) to add to your deck. The first wizard to remove the last white "life" mana from another wizard's pool (effectively killing them), is the winner!