In truth, this was quite similar to skill enhancement, but far more targeted.
For example, take the "Sponge Body" skill. This ability had a variety of complex effects, one of which was "Absorbs all energy and physical attacks, converting them into storable energy." Su Ze could continuously expand this effect, turning it into "Absorbs *any* attack, converting it into storable energy."
In other words, it would bring mental attacks into its absorption range as well.
The skill also came with a "Regeneration Core," which provided near-death healing. Ideally, Su Ze could expand it into having "an extra life" or "a one-time revival."
Once both of these aspects were fully expanded, the originally bloated skill would be streamlined into three relatively simple effects.
"Indestructible Metallization," "Absorb All Attacks for Stored Bursts," and "One-Time Revival."
