Only when the lizards died did Cairo felt relieved. This floor was really much more dangerous than the other ones and even if things seem to be doing alright, he still needs to be always cautious. He never known when will a danger arrives and he always needs to put up his guards
Now that Cairo killed the lizards, he realizes how much stronger he becomes. It might not show right now but he is still aware that the progress he had now is fast considering his current level
His soul and body were still being pressured by the Tower of Ambition making it so that he is not back at full power. However, if the suppression vanishes, he would be able to unleash all of his power that was definitely strengthened
After all, Cairo can already move and use magic at this extent even though he was enduring two kinds of pressures. What more if the pressure vanishes?