If there is one rule all must follow while undergoing tribulation, then it is the fact that you must only attack when the tribulation completely reveals itself.
If you were to attack while it was manifesting, the heavens would consider it as defiance and thus turn their fury on you.
Regardless of how one hates the heavens, this one rule will be obeyed by them. However, Klaus is different.
His hate toward the heavens isn't merely a feeling. His hatred is what fuels his strength. This was why, when the heavens self-destructed, the black spear, he got angry and started doing what they said shouldn't be done.
Klaus destroyed the five spears that came after the first spear, causing the heavens to boil to the point that Klaus hadn't even passed the first form of the Tribulation, but they had already started sending down the Karmic retribution.
