The Dungeon Master

Eminence—If you would roll one or more dice,
instead, roll that many dice plus one and choose
which dice to use for the result.
At the beginning of your upkeep, roll a d20.
1 -5| Scry 1, draw a card.
6 -10| You gain 2d4+2 life.
11 -15| Add {b}{g}{r}{u}{w}
16 -20| Reveal cards from the top of your library
until you reveal a nonland permanent card. Put that
card onto the battlefield and the rest on the bottom
of your library in random order.