Mephis could summon high-star Bird-Beast Species without tributes. Professor Harvey lacked such an ability, but he could create large numbers of tributes out of thin air, then directly Tribute Summon nine-star Undead Species.
Against an opponent like Mephis, the undead horde tactic was ineffective—but an undead horde could also serve as a sea of tributes.
Their summoning, field development, and battle continued without pause.
A second twelve-star, fifth-tier Undead Species soon appeared within Professor Harvey's "Undead Realm."
The "Undead Realm" expanded again, further squeezing Mephis's available field space.
Mephis did not summon a stronger Magic Spirit, but instead activated "Divine Secret Rite." Targeting the newly summoned twelve-star Undead Species, he unleashed divine pressure in an attempt to subdue and enslave it.
He intended to turn his opponent's own method against him. And he did succeed.
But at the instant that twelve-star Undead Species was enslaved, Professor Harvey raised a hand and snapped his fingers. The twelve-star Undead Species suddenly fell apart, turning into a heap of bone fragments.
It had not died; it had merely transformed into a small mountain of piled bones. Founded upon death, it could not be enslaved!
Professor Harvey then activated "Undead Fusion," fusing that heap of bones with another twelve-star Undead Species, [Necromancer King Crow].
Thus, the full fifteen-star Undead Species, "King of the Undead," took the stage.
Mephis's expression darkened as he felt an unprecedented pressure. But after the turn shifted once more, he finally summoned his own god—[Beast King God Dragon Lion]!
[Beast King God Dragon Lion] was a colossal Magic Spirit with a lion's head and a dragon's body. Though it was smaller than the "Mountain Giant King," it was still enormous by the standards of ordinary Magic Spirits, measuring over ten meters in length.
More importantly, it radiated an exceptionally terrifying