Axiom

Axiom is an Aetheric substance, and is one of the components of aether. It's infamous in the Prime Chronoverse for being the power Devils draw on. Axiom is highly notable for its powerful reality warping capabilities.

Axiom Pools
The Axiom Pools are a series of separate realms that are nonetheless connected to the Aether Pool. Axiom pools form due to the fact Axiom drains away from other components in the pool, resulting in it collecting in those smaller realms.

Each spark in the multiverse is connected to a pool. Without a connection to an Axiom pool, sparks will starve and eventually disintegrate. In addition, each Axiom pool has an "allowance" for each spark based entity that is connected to it, which takes up a certain segment of the pool. Spark based entities draw Axiom for use from their dedicated allowance. Over time, Axiom from the Aether Pool drains in, regenerating its allowance.

The largest and most accessible Axiom Pool, also known as the Orgin Axiom Pool, is the pool that Devils are connected to. Due to the fact they all draw from the same pool, eliminating a Devil increases the allowance all other surviving Devils have.