User blog comment:Firefist553/make your own devil fruit/@comment-3097081-20110216171454

Dojo Dojo no Mi - an ability that gives it's user the power to determine the rules of competition, including reward and punishment. Competition includes pretty much any situation in which 2 or more people compete to determine a victor and a loser.

I got the idea from dojo yaburi, the practice whereby a martial artist challenges a dojo, the reward should he win being their sign, and the dojo determines the rules of the fight, condition of victory, as well as punishment should the challenger lose (in the old days, losing meant death, not that they killed you if you lost, but that you usually got killed in the fight since they fought seriously. Losers that survived usually committed seppuku).

With this ability, you could make rules in your fights that can give you an advantage over your opponent, and you can decide what the reward for the winner would be; for example, the winner will have all their injuries healed, or the loser has to give the winner something. You can also decide on punishments, to ensure that your opponent obeys your rules.

I can't really explain the limitations of this ability. It's basically dependent on your imagination, but it's not all-powerful. You can't make a rule saying your opponent can't fight back and if you win you get One Piece. They have to be reasonable.

I know most people will think that, if the rules, rewards and punishments are limited too strictly, then it's not really an ability, but think of it this way; it can force people to do things, by pain of punishment should they fail to comply. It can also give people access to things that they normally would not have access to, via the rewards. The rules, rewards and punishments are all dependent on your imagination.

e.g. I have this ability and I fight Luffy. I make the rule that he can not use Haki, and the punishment for using haki is that he can not eat for a week. Even if he puts food in his mouth, chews, and swallows, he won't taste anything, won't satisfy his hunger, he won't even be able to experience the smells and textures of the food. The reward should I win will be that for a month, I will have his Gomu Gomu abilities. If I lose, he gets my ability for 3 months (my loss is heavier than his since I do not have any punishment, since in this case the rules only apply to him).

So basically, everything must be balanced, the risk and the gain, the punishment and the reward.