Lol, the MC is too Cautious about his Cultivation base he raised his Cultivation Realm Foundation to the most solid form, so solid that the Heavenly Lightning Tribulations that was said can Exterminate Geniuses with High aptitude can only Ascend his upper body to Immortality XD.
Amitabha. This lowly heavenly tribulation is not strong enough to tribulate the esteemed tribulatee. Please wait a moment for this lowly self to call for a stronger aid. (Big bro, help!)