While attacking the Skyflying Race True Immortal, Ye Han had discovered that the key to controlling this enormous secret realm space largely lay in the Skyflying Race True Immortal's heart.
Ye Han naturally knew that attacking this Skyflying Race True Immortal would be extremely difficult. As long as he remained inside this restricted secret realm, he would be constrained at every turn.
However, as Ye Han fought his way here, he had carefully observed the surroundings of the cave. Although he did not recognize the densely packed ancient runes, all their myriad variations still stemmed from the same root.
The various races of cultivators each possessed their own mysterious runes, incantation scripts, and hand seals. All these runes and hand seals had been created based on various heaven and earth laws.
Whether divine abilities or spells, all were confined within the bounds of laws. Cultivators used various mysterious runes to construct and invoke the power of these heaven and earth laws.
Taking fire-type spells as an example, cultivators would draw various runes based on their understanding. However, there were enormous differences between the runes of ancient times and those of the present.
This was mainly because different cultivators understood and comprehended runes differently, thus developing their own unique cultivation systems.
For example, when the Immortal Race invoked the Fireball Technique, a fire-type spell, the runes they had developed were closely linked to their racial bloodline.
These runes could activate the Immortal Race's bloodline spell power, which in turn drove and unleashed their spells.
Likewise, when Divine Race Cultivators researched fire-type spells, the runes they created also had their own unique characteristics.
Although they differed from the Immortal Race's runes, they could still produce the effects of fire-type spells. This was because the spells unleashed by both the Immortal Race and