After "McGwire's Death Tomb" was discovered by players, it also appeared on the list of secret realms they could choose from, ranking as one of the higher-level realms.
This meant that the challenge level of "McGwire's Death Tomb" was over one hundred levels, a kind only accessible to those who had broken through to become Gold Level Mages and were thus eligible to team up and venture into its depths.
Of course, there were players who didn't believe in its difficulty and immediately organized a group of top-tier experts to tackle this secret realm.
As you might expect, it ended in total annihilation, not sparing even the professional players!
According to the information posted on forums by the participating players, "McGwire's Death Tomb" was actually a maze located deep underground, dark and dreadful, and populated mostly by zombies, ghouls, and skeleton soldiers, with a challenge level between LV110-120. They all fell before even glimpsing the final boss.