Kernel

The Kernel is both the Digital World's core and the domain of its God. It is the three Celestial Digimon's primary duty to defend the Kernel.. Rasielmon possesses the mysterious power to foresee everything in the world from the Kernel. It is said that it knows all about events throughout the Digital World, and has gained a divine amount of knowledge with that power.

Digimon Chronicle X
When the join the  in their fight against the, Seraphimon stays behind to protect the Kernel.

Digimon ReArise
The Kernel contains all information about the Digital World, both past and future and is referred to as God's Territory, with Angel Digimon protecting it and hiding it from anyone else being able to access it. If anyone were to access it, its power is so vast it could even be used to remake the entire World.

is able to see the future and witness all things in the Digital World due to the power imbued in it by the Kernel.

After Eiji is able to get into the Kernel by using the power of the Spiral and the DigiCores of the s, he is able to use its power to look for the information he wants. When the, , , and arrive and confront him, he ends up playing the information which causes his mother's memories to play. After freaking out and learning that his mother had died after giving birth to Mon (with both learning they were related) one of the Spiral working with Eiji attack him during his break down and take over the Kernel, its plan all along being to take it over so it could use the Kernel's power to destroy both the Human World and Digital World as revenge for them persecuting the Spiral. The Spiral were originally a hive mind, however this one had glitched and gained its own sentience and named itself Spiral Origin. Jesmon and Rasenmon try to stop Spiral Origin, however now having the power of the Kernel it easily defeats them, banishes them out of the Kernel, then begins its plan to destroy both Worlds.