Though his gaze remained fixed on the arena, his thoughts were already churning in his mind.
Judging from the surface alone, the summoning requirements for Acceleration Summoning were not all that different from those of Tribute Summon.
Both required sacrifices, and the total star level of the Magic Spirits offered as sacrifices had to equal that of the Magic Spirit ultimately summoned.
Furthermore, if the Magic Spirit one wished to summon belonged to the Fourth Tier, then among the Magic Spirits offered as sacrifices, there had to be at least one Magic Spirit of the Third Tier, and so on.
These two points were both necessary conditions for Tribute Summon.
On top of that, Acceleration Summoning had to satisfy an even stricter condition.
That was, among the Magic Spirits offered as sacrifices, there had to be at least one Magic Spirit associated with "time."
In that Bronze Clan contestant's Acceleration Summoning, the Bronze Dragon used as a sacrifice was a Magic Spirit that satisfied the "time" factor.
Sky City referred to such Magic Spirits as "Time Magic Spirits." "Time Magic Spirits" were not distinguishable on the surface.
Magic Spirits with the same card name could either be associated with the "time" factor or have nothing to do with it.
Those who were not long-lived races and had not mastered specialized abilities could not perceive the difference.
But on the surface, any Magic Spirit that could be accelerated into a high-star Magic Spirit through the Aging Curse of a long-lived race was a "Time Magic Spirit." These three points together formed the necessary conditions for using Acceleration Summoning. Compared to the requirements for Abyss Summoning, it had no advantages at all—only disadvantages.
But in practice, those capable of using Acceleration Summoning were all long-lived races from Sky City. And before mastering