Raijin’s Core is the gatekeeper material for every lightning-focused endgame upgrade in Haze Seas. It comes from a single super boss on Rainbow Sky Island, and the only way to speed up the farm is to run the summon loop cleanly every time the timer resets.
Quick answer: Travel to Rainbow Sky Island in Sea 3, kill island enemies until you collect 4 Divine Sparks, activate the four large pillars, then defeat the Raijin (Ryujin) super boss that spawns. The boss has a one-hour cooldown between summons, so line up every step before each spawn.
Where Raijin spawns and what you need first
The Raijin super boss lives on Rainbow Sky Island, one of the two live regions in Sea 3. You must have cleared the Sea 3 entry requirements to reach the island in the first place. Once you are there, the boss does not roam the map. You summon it through a pillar ritual, which means you control when the fight starts.
You can reach the game directly from its Roblox page if you need to jump back in before a run.
How to summon the Raijin boss
Farming faster: cooldown and drop rules
The single biggest limiter on this farm is the boss cooldown. Raijin can only be summoned once per hour, and that timer cannot be skipped or bypassed. Because of this, the fastest way to stockpile cores is preparation, not brute force. Pre-farm your Divine Sparks and know your four pillar locations so that the moment the cooldown resets, you can spawn and drop the boss immediately.
Drop reliability is described differently depending on where you look. Some material listings mark Raijin’s Core as a guaranteed 100% drop from the boss, while boss-farming notes treat it as a chance drop where a failed roll means waiting out the full hour before you can try again. Either way, the practical takeaway is the same. Assume you may need several kills, and budget your play session around the one-hour lockout rather than expecting one run to finish the job.
Note: If you plan to unlock more than one upgrade, farm the extra cores in the same sitting. The cooldown makes it painful to come back later for a single missing core.
What Raijin’s Core unlocks
Raijin’s Core feeds three separate lightning upgrades. Knowing how many cores each one costs tells you exactly how long your farm needs to last.
| Upgrade | Cores needed | Best for |
|---|---|---|
| Golden Staff V2 | 1 | Single-target lightning and PvP burst |
| Electro V2 | 2 | Mob clearing and mastery grinding |
| Electricity Fruit awakening (Raijin Form) | Varies | Fruit-based lightning build |
| Full lightning loadout | 3 minimum | Staff and Electro together |
Golden Staff V2 requirements
Golden Staff V2 does not drop from any enemy. You craft it at the Forge NPC after meeting all three requirements below. The upgrade is permanent once applied, so there is no way to undo it.
| Requirement | Amount |
|---|---|
| Golden Staff V1 mastery | 300 |
| Cash (Beli) | 2,000,000 |
| Raijin’s Core | 1 |
Electro V2 requirements
Electro V2 is the evolved fighting style. You unlock it at the Electro evolution NPC in Land of the Gods, the other live Sea 3 region. It costs two cores rather than one, plus mastery and gems.
| Requirement | Amount |
|---|---|
| Raijin’s Core | 2 |
| Electro V1 mastery | 300 |
| Gems | 500 |
Tip: Start grinding to 300 mastery on Golden Staff V1 and Electro V1 before you own any cores. That mastery grind usually takes longer than the boss farm, so getting it out of the way early means your cores are never sitting idle.
How to confirm the core dropped and the upgrade applied
After the boss dies, check your materials inventory for Raijin’s Core. If it is not there, the drop did not roll and you must wait out the one-hour cooldown before summoning again. For the upgrades themselves, the Forge NPC will only complete Golden Staff V2 when your V1 mastery reads 300, your Cash meets 2,000,000, and a core is in your inventory. Electro V2 works the same way at the Land of the Gods evolution NPC, so a missing requirement is the reason the option fails to trigger.
Because cores are scarce and the timer is fixed, decide your priority before you spend one. Grab Golden Staff V2 first if you fight bosses or other players for its single-target burst. Take Electro V2 first if you spend most of your time clearing mobs, since its crowd-control skill speeds up every future farm, including the runs for any remaining cores.
