Ominous blade
"I can tell that it is made of the same material as the handle," Isa said. "Sorry for saying that, but I know for a fact that running a way from something unpleasant isn't a good idea."
"... I suspected as much," Rain thought and then sighed. "I won't say that this is a family heirloom, but are you fine giving me this?"
"I was supposed to be giving you something of equal value compared to what you gave me, but this can be a curse as well," Isa said. "It is a powerful relic that will increase your abilities, but it will also torment you a fair bit."
Those words bothered Rain a fair bit, but he needed to gain as much power as possible. Since most of the water dragons were there, it was their best chance to decrease their numbers massively. At the same time, they could recover another relic and finally bring closure to at least one of the aspects of the war of one hundred years ago.