Dice of Fate

{t}sacrifice Dice of Fate. Players roll a D20
1: lose the game
2,7,12: gain 5 life
9,5,17: draw 3 cards and lose 3 life
7,6,3: scry 4
4,13,15: gain hexproof until your next turn
8,14,16: creatures get a +1+1 until your next turn
10: discard half your deck
18,19,11: redraw your hand
20: win the game