Duel of the Two Mystics

Creatures can't be the target of white, black, and green spells.
At the beginning of each opponent's end step, that opponent discards a card and you draw a card.
At the beginning of your end step, Duel of the Two Mystics deals 3 damage to you.
Incarnations of Madness and Interpretation, enlaced in a fate that would change the shape of destiny.