Idle Death Gamble

Roll a d20 and match the result to the effect:
1: You lose the game
2-5: Creatures you control get +1/+0 till end of turn.
6-9: Creatures you control gain first strike till end of turn.
10-14: Creatures you control get +2/+2 till end of turn.
15-19: Creatures you control get +3/+3 and gain double strike till end of turn.
20: You win the game.
You may have any number of copies of this card in a deck.

Flashback {1}{u/r}{u/r}