As noted earlier, the Dragon Balls can be divided into two groups: the Dragon Balls that give the user control of things (such as the Time Machine and Instant Transmission), and the Dragon Balls that give the user power (such as Super Saiyan transformation). The second group is the group of balls that will be most likely to survive a fight (and the cost of bringing them back to life will be most likely to the user's disadvantage) and the first group is the group of balls that will just about survive a fight, and will be the least likely to the user's disadvantage. For the second group of balls, the most interesting thing about them is that they are found in a temple where the user of the Dragon Balls is born, and where there is a weapon (such as a sword) that can destroy them, however neither of them have been destroyed as of yet. Most of the Dragon Balls are simply a source of power and some are used to defend against certain types of attacks.
The first group of Dragon Balls are the ones that are most likely to be destroyed in a fight, however the ones that are most likely to survive the fight is the secondary group of Dragon Balls as they are the ones that are found in a temple and thus survive the fight as long as they don't break or are not destroyed by the user of the Dragon Balls (in the original Dragon Ball, Yamcha had to collect the seven Dragon Balls because the Seven-Star Dragon Ball was in a temple where he was born and thus survived the fight) and in the anime, the first group of Dragon Balls are the ones that are used to deal with the most powerful forms of attacks (such as Kaio-Ken, Zarbon's Meteor and the Unibeam) or the most powerful forms of attacks that are usually more than they are able to defend against (although this is a double edged sword as some of the attacks that would destroy or at least severely damage the ball are what makes the fight interesting).
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