With standards for classifying corpses in place, the remaining matter concerned the Building Blueprint for the Summoning Tower.
Corpse classification and corpse cultivation required an environment heavy with Yin Energy and Evil Aura, but the environment required for Summoning was not nearly as important.
The reason Gu Xi had come to Aryadovi City to reconsider Summoning was, from the very beginning, to upgrade and strengthen the Summoning Tower.
After all, Gu Xi needed a way to solve the mana consumption issue during Summoning.
Modifying the Summoning Tower was Gu Xi's best option at present.
Gathering the Summoning Towers together to form a Summoning Area could be dealt with gradually later, but the matter of the Summoning Towers themselves had to take priority.
After all, Necromancers also had a need to perform Summoning directly on the battlefield.
Gu Xi had not considered so much before. He would often wait until battle ended before using the Summoning Tower for Summoning.
But he had thought it through now.
Temporary battlefield Summoning was also a kind of Tactics.
If he could keep performing Summoning without interruption, it would be equivalent to Gu Xi opening up another Undead Scourge.
As long as Gu Xi was alive, he could continuously summon the corpses on the battlefield.
Gu Xi had been unable to do this before because he lacked mana. Even after doubling his mana, it had not exceeded twenty thousand.
Moreover, he needed to reserve mana for other matters. He could not possibly pour all of it into Summoning.
Even spells like Ghost Gate Opening were more effective than Summoning on the battlefield.
But Kru's earlier reminder had made Gu Xi understand why the second building Death City deployed onto the battlefield was the Summoning Tower.
It had not been prepared merely to make post-battle Summoning