"Shit! Shit! Shit!" Slayer was flabbergasted the moment his level dropped to 299. Normally, even if his level were to drop, he wouldn't be flustered, for it was just a matter of Mental Energy requirement to regain the lost levels.
The only problem were the bottleneck levels: 100, 200, and 300. Attaining that required a qualitative change, which was hard to achieve once lost. As for the current him, attaining level 300 was impossible.
After all, he lost it, the qualification to be a Grade 4 System.
"Zaira! Zaira!" Slayer bellowed the moment he arrived at the System World, observing the Mental Energy condense into the figure of Zaira before him as he said in a fluster, "W-What should we do now?"
'This state of mind he displays…' Zaira sighed, 'The old Gilthru wouldn't have allowed it to get to his head. He would have concealed himself further to accumulate strength once again.'