Mythcaller Ashdust

Flying
The first multicolored spell you cast each turn
costs up to {x} less to cast, where X is the number
of different combinations of two or more colors
among the mana costs of permanents you control.
Whenever you cast a legendary spell, scry X,
where X is the number of that spell's colors.
Then if you don't control a permanent that's
exactly those colors, draw a card.