Glory of the Zora Walkthrough

After completing the Water Temple, go to Zora's Domain and speak with Dento, who is located past the general shop.

Dento will ask for a Zora Spear, 3 Diamonds, and 5 Flint to craft a weapon for you.

Where to Get a Zora Spear: You may already have one from completing the Mired in Muck side quest near the Upland Zorana Skyview Tower. If not, defeat a Lizalfos west of Ralis Pond, across the Zora River, who always wields one. This Lizalfos will respawn (be brought back to life at a checkpoint after death) after every Blood Moon. Alternatively, defeat Like Likes in Zora region caves; they drop chests that may contain a Zora Spear.

Where to Get Diamonds: Diamonds can be found in Rare Ore Nodes or dropped by Stone Talus (Rare) enemies. Some Shrines and side quests also offer them as rewards. You can buy them from a vendor in Goron City for 1,000 rupees each, but they sell for 500 rupees.

Where to Get Flint: Flint is found from most ore nodes, especially in caves and around the Eldin region. You need 5 pieces.

Once you have all the materials, return to Dento.