Rules Change To Precombat and Postcombat Main Phases
On July 23rd, Magic Rules Guru Matt Tabak confirmed this functional rules change through a series of explanatory tweets.
tl;dr Neheb the Eternal is nerfed. Anything that just says “postcombat main phase” now only refers to the “second main phase” so if you have something creating more then it won’t keep triggering.
Looks like they exempted Neheb and a few other cards after this announcement.
Oh cool, I’m glad they did for all the people who like playing with him. Good job by the RC.