The rainbow water droplets in "Dragon Quest III: HD-2D Remastered Edition" are props with special functions in the game. If you want to use the rainbow water droplets, you can go to the peninsula northwest of Rimuldal, where, The rainbow droplets will form a bridge leading to Zoma's castle.
How to use Rainbow Water Drops in Dragon Quest 3 Remake
The temple mentioned by Rubis is located in the southeast of the map, located on an isolated island. Sail there by boat. After entering the temple, you will see an altar with almost nothing inside except a priest waiting for your arrival. There is also a monster that can be recruited hidden in the northwest corner of the second floor.
After talking to the priest, he will combine these items into rainbow blobs. This process does not consume the Holy Amulet, so you can continue to use it as an accessory. The priest will then tell you to travel to the peninsula northwest of Rimuldar, where the rainbow drops will form a bridge leading to Zoma's castle.
Now, head there and use the rainbow drops to form a bridge to complete the connection. The bridge would remain forever, and the road to Zoma was finally clear.
Before entering Zoma's castle, remember to collect the King's Sword, the Hero's Shield, and the Helm and Armor of Light. This equipment will help you a lot.
