After obtaining the undead servant skill, Lu Yan planned to build an undead army.
The undead enslaved by the Undead Servant skill were different from the undead summoned by his other skills, such as the skill of the skeleton elite army.
The former would not dissipate unless he died.
The latter was summoned by a skill and required one to consume their strength to maintain it. Without enough strength, the undead summoned by the skill would dissipate.
However, the advantage was that even if they were destroyed, he could still summon an equal number of undead the next time.
Both had their pros and cons, but it was unlikely for him to rely on skill summoning to build an undead army.
Therefore, he still had to rely on the Undead Servant skill.
