Wild Magic surge

When you play this card you may {p/r}, and roll a-
die 1 time for each {p/r} spent this way. and trigger all effects.
1-2:Discard you hand
3-4:take 3 damage
5-6:gain 3 life points
7-8:Exile the top card of your library, you can play exiled cards until end of turn.
9-10:Play a random card from your hand, without paying its mana cost.
11-12: draw a card.
13-14:Destroy target 1d4 target permanents.
15-20:Roll twice, take both results.