Tide

It was also a pity to kill the Undead but give up on their Soul Fires. They didn't have time to collect them, but Barton and Lagulin didn't need to collect them. With the innate devouring abilities of the Undead, they could forcibly absorb and devour Soul Fires.

As for Lin Yun, he was holding the Book of Death and flipped it to the Sage Chapter before rousing its power to keep devouring the Undead Essence falling in his surroundings.

The Sage Chapter hadn't been used for a very long time, because it could no longer make itself useful. The Sage Chapter could only copy Ultimate Spells up to the 4th Tier, and 4th Tier Ultimate Spells only had the power of a 6th Tier Spell. Even if Ultimate Spells were powerful, they weren't too useful.

Moreover, the Sage Chapter required too many Undead Essences in order to raise the tier of the copied Ultimate Spells. He could only visit the famous Undead Plane later on, as only that place had enough of the Undead to kill.