There were three ways for disciples from the Fire Worship Sect's Four Symbols Sanctums if they wanted to enter Fire Worship Sect's Saint Land to become a Saint Land disciple.
One, they had to be outstanding and had an extraordinarily high innate talent. Apart from that, they would also need the recommendation of one of the four Sanctum Leaders of the Four Symbols Sanctums.
The second way was to successfully comprehend and master the precious Divine Ability in the Sanctums they were in.
The third way was to participate in the assessment of the Fire Worship Sect's Saint Land. Usually, only Four Symbols Sanctums' disciples at the Mastery Quintessential Saint Stage or above would be given a chance to participate in the assessment to become a Saint Land disciple.