Stamina = roll 2d6 + 12
Skill = roll 1d6 + 6
luck = roll 1d6 + 6

1) roll 2d6 and add your skill. That's your attack strength
2) roll 2d6 and add the monster's skill. That's his attack strength
3) Whoever gets the higher number hits the enemy.
4) Whoever get hit subtract 2 from it's stamina

1) roll 2d6. If the number is lower or equal to your luck score, you've succeed.
   If it's higher, you've failed.
2) Whatever the result, subtract 1 from your luck