Hakos Baelz, Chaos Creator

If you would draw a card, instead roll a d20.
1-5 | Exile the top card of your library. You may
play that card this turn.
6-10 | Draw a card.
11-15 | Exile the top two cards of your library.
Until the end of your next turn, you may play
those cards.
16-20 | Draw a card, then roll again.
Whenever you roll one or more dice, creatures
you control get +1/+1 and gain haste until end
of turn.