Although Ujfalusi temporarily had the ability to cast the Tide of Death with a bottle of Arcane Magic Potion, this was not the genuine Legendary-realm. The current Ujfalusi was still a level-18 Necromancer, and he was still far from the Lich in the Syer Town's ruins that could summon Humerus Wyrms.
Just by taking a closer look, one could tell that the Undead creatures surging out from the Tide of Death were still far from being as powerful as the ones back at the Syer Town. There were large numbers of Skeletal Warriors and Hell Ghouls, but there were actually very few Vampires and Liches with powerful combat prowess…