Alex smirked as he asked the question to the system. Indeed he can't trust anyone, not even his own shadow completely but that doesn't mean he can use loopholes to make it happen.
There are lots of ways he could exploit this rule but for this he just had to use his god-level acting to pass through the needed requirements.
'System you forgot my god-level acting skill.'
He told the system after the system, not giving him an answer, He could not imagine how much-crazed stuff he would be able to do if he just got the power of reality-bending.
He might not be able to kill the protagonist on one thought but he could make their life hell to make them bleed their luck so much so that they would lose their protagonist status and then it will be easy to take care of them.