Spellcraft was everything in the utilization of [Degradation].
Once I released my energy into the energy-rich environment, thanks to the S Bomb I had previously disengaged, I caused all of that energy to flow around my opponent, preparing for the next phase.
The next thing I did was to use [Unknowable] to mask the effects of my opponent's surroundings as it transformed into a Spell.
I wasn't sure how minute a Spell had to be for it to not be detected, since my previous interactions with it hadn't given me enough data to make a perfect estimate.
My [Absolute Suspension] delved into the realm of concept manipulation, and the control of various laws, which were generally invisible to the eyes.
As for Spellcraft, since it was a technique, it could be that the enemy didn't register it as a Spell that required copying. As a result, now that I was going to use Spellcraft to cast a Spell, it was possible that my opponent would sense and copy it.