Instant

In a duel, both parties must begin summoning their grimoire at the same time to avoid any form of exploitation. This way, the battle would become fair, and it would boil down to who can summon their grimoire first. 

The first person to summon the grimoire would be at a huge advantage over their adversaries. 

When Marcel's countdown reached 'one', both Gasper and Miguel immediately summoned their own grimoire. 

However, the disparity between the two of them became obvious at the very next moment. 

One closed his eyes to chant and summon his Bronze Grade Grimoire, while the other simply waved his hands in the air before a jet-black grimoire appeared in front of him in an instant. 

The other still had his eyes closed while the other had already summoned his beast. 

The other still had his eyes closed while the beast of the other had already begun to condense an attack.