It took Rain several days for him to connect the dots. Considering what he heard from the shield and what he knew about all relics, there was one thing that they all had in common… desire.
Even the power of the sins was filled by desire and the system recognized it as another source of power for the dragon. The shield, and the spear offered Rain a great deal of power when it comes water based attacks, and even blocking them, but the shield desired to be used to kill more dragons. That didn't make it stronger, but it certainly would free the guy inside…
At the same time, the golden bow was powerful on itself, but it could become powerful enough to shot down dragons under the right conditions. Those were that the user had valuable things with them. Rain was certain that such a power was connected to the greed… but he wasn't certain if the shield had a conscience like the shield.
My Legendary Weapon Can Evolve Infinitely!