According to Leo, the first step of subduing any monster was to tire it out. Only then, it could listen to your words.
Therefore, he didn't waste any time and directly used his first trump card.
[Supreme Nether Domain - Nether Rage Booster]
Since there were ten level 9 supreme-ranked monster kings along with 30 level 8 supreme-ranked and 60 level 7 supreme-ranked monster kings, Leo knew it would be hard for him to control all of them without using his trump cards.
'Ding,
The host's talent [Call of the Lightning] will be upgraded to level 9 supreme-rank for one minute.
'Time to execute the plan.'
Leo felt his special talent [Call of the Lightning] was a good talent to tire out all the monster kings within a minute even without using the special effect of that talent.
From what Leo had experienced earlier, he was confident that if he used the special effect [Lightning of the Obliteration], they would be instantly killed.
