Inner World: Sanctuary

Inner World: Sanctuary is said to be the greatest cultivation technique ever created. The cultivator of this technique creates their own "Inner World" which can store things and its size is determined by the quality of their energy. Within the inner world the cultivator is akin to a god. While creating this world, your energy and soul cultivation are sealed. This technique allows you to ignore suppression in different universes.

The main reason Inner World: Sanctuary is considered the greatest cultivation technique is because of the longstanding impact it has on one's foundation. No matter who you are there will always be flaws in your foundation. The advantage of Inner World: Sanctuary is that you can continuously adjust your foundation. This means that mistakes made at the essence gathering, saint realm... transcendent realm can always be made up for. No other techniques let this happen.