Deck Of Many Things

{3},{t}: Roll a D20 and subtract the number of
cards in your hand. If the result is 0 or less,
discard your hand.
[1-5]: Draw a card then exile the top card of your library. You may play the exiled card this turn.
[6-10]: Venture Into The Dungeon or the next
room you enter this turn triggers twice.
[11-15]: Scry 2, untap another target permanent,
or gain 3 life.
[16-20]: Create three tapped treasure. Deck Of
Many Things doesn't untap your next upkeep.