The Rare Defense Gem, previously known as the Rainbow Defense Gem, is a diamond gem created by fusing all eight elemental defense gems together in the proper order (1. forge: fire, ice, water; 2. forge: electric, poison, wind; 3. forge: gems from 1. in 2. forge and one hexagonal gem). It grants defense to all elements in the game (prism defense) and sells for 20,000. Forging three rare defense gems together produces a Rare XP Gem which grants 1,000 xp on every hit. It is the only rare gem that only needs low costing equipment to make it.
Note: Make sure you have no store-bought dark or light defense gems in your inventory before starting the process, or you may get them mixed up with the ones you craft. Only gems forged manually will yield the rare defense gem.
All of the required gems, aside from dark and light (which both need to be crafted), can be purchased in the store.
- Fuse fire, ice, and water defense gems together (in that order) to get a light defense gem. All of them can be bought from the store for 5,000. The forge process takes 1 month game time or 30 minutes real time.
- Fuse shock, poison, and wind defense gems together (in that order) to get a dark defense gem. All of them can be bought from the store for 5,000. The forge process takes 1 month game time or 30 minutes real time.
- Fuse the light and dark defense gems (must be the forged ones) together with any hexagon gem (in that order) to get the rainbow defense gem. The forge process time changes depending on the level of the hexagon gem, with a cheaper gem resulting in a quicker forge process, and a more expensive one increasing the amount of time it will take for it to be completed. It is recommended you buy a low-cost hexagon gem from the store for this forge.
Upon obtaining the rare defense gem, the "Solar Fusion" achievement is unlocked.
If you forge three Rare Defense Gems together, the result will be a Rare XP Gem.