‘The great, great, high-ranking, more powerful, etc. drop them heartlessly. ‘ But none of them bother to name specific Heartless they actually drop so you can try to narrow down some areas for potential farming.
To recap: Source Crystal drops from Large Heartless in worlds like San Fransokyo, the Caribbean, and Monstropolis. You can also earn Wellspring Crystals in Kingdom Hearts 3 by interacting with Battlegates such as Battlegate #12 in San Fransokyo and Battlegate #10 in the Caribbean.
The absolute best place to get Source Crystals and Gems in Kingdom Hearts 3 is in San Fransokyo. This is one of the later worlds in the game and the home of Big Hero 6. It’s a sprawling metropolis that you’re free to explore and, more importantly, it has Battlegates.
In Kingdom Hearts 3 Ultima Weapon is the most powerful Keyblade available for Sora in Kingdom Hearts 3 – but you have to go through quite a long and tedious process to unlock and craft the weapon.
Pulsing Gems can be obtained by defeating the Pogo Shovel Heartless found in Kingdom Hearts 3’s Monstropolis and Sanfransokyo. A decent number spawn from the Powerplant Accessway area of Monstropolis, so head to this world if you want to quickly collect a large amount of vibrant gems.
This one is just in a chest in the Caribbean world. Take to the high seas and travel to Exile Island. In the middle of the island you will find a chest with the precious material.
The camouflage requires you to finish two Deepsight Resonance variants to unlock them in the weapon maker. That’s easier said than done, since the Deepsight variant of the camouflage has a comically low drop rate and only comes from the Wellspring activity.
The Wellspring: Defend yourself
First you have to charge the Wellspring in the middle until the number reaches 100. It’s like those public events where Guardians have to stand on platforms to charge it.
The Proof of the Past that unlocks Oblivion is a bit more challenging as it requires a lot of skill and not just dedication to a repetitive task. To unlock it, players must master the game in Critical Mode, the extremely challenging game mode added to Kingdom Hearts III with the April update to version 1.04.
The Dark Inferno secret boss from Kingdom Hearts 3 will appear after the end of the game to challenge you.
The Two Become One represents Roxas, as evidenced by his acquisition, appearance, and ability to light & Dark, which causes Sora to enter either Anti or Final Form when activating a Drive Form.
The first is at the entrance to the tunnel on the west side of the map. Completing this will give you Ying Yang Cufflink and Secret Report 11. Battle Gate 12: The second San Fransokyo Battle Gate is located in the bank’s helipad. Completing this will earn you the Blizzard Cufflink and Secret Report 12.