Every Old God had its own characteristics. Although all of those characteristics involved stirring up negative emotions, each Old God specialized in a somewhat different field, as though they were five individuals split from a single whole.
Based on the information available, Y'Shaarj, once the most powerful, could manipulate seven negative emotions in creatures, encompassing almost all living beings, and was therefore the strongest of the Old Gods. C'Thun, the Old God sealed beneath the Silithus Great Desert, was known as the Many-Eyed Fiend and captured living beings' wills by controlling their vision and creating illusions. N'Zoth, the God of a Thousand Whiskers, the weakest Old God sealed beneath the sea, probably manipulated dreams, guiding living beings from another dimension and making them fall into darkness.
Xal'atath, the first Old God to die, was the most mysterious. However, judging from Kel'Thuzad's scattered remarks in the past, her ability probably involved manipulating intelligence, slipping unnoticed into living beings' minds and replacing their sense of self at its very core. Yogg-Saron, whom Dick was about to face, was known as the Fiend of a Thousand Throats. That title alone offered a clue: its power lay in sound.
Freya, Auriaya, and Ignis had all mentioned that voice constantly churning through their minds, a voice that even the Guardians' wills could neither erase nor resist. Although creating illusory realms and images within creatures' thoughts was a basic ability every Old God possessed, there was no doubt that, at least when it came to illusory sounds, Yogg-Saron was indisputably the strongest.
However, because Dick had deliberately used his authority to reinforce the Crimson Halls of Insanity, where Yogg-Saron was sealed, to its limit before entering Ulduar, they had yet to encounter Yogg-Saron's illusory voice directly.
But even Dick himself had doubts about the strength of