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Summoning spells were not something anyone could use.
Even summoners had to pay a certain price to perform a summoning.
Sometimes, even after paying the price, one might not achieve the purpose of the summoning.
But there existed beings, for whom summoning was as easy as a routine meal prep.
Those were the Pureblood Beast Clan!
Xiaoshi was a Pureblood Angel, and her summoning spell, to put it bluntly, was like shaking down relatives. When a junior was in trouble, they'd ask their still-living ancestors for help, for a bit of support.
As long as there were forebears above, a response came with every shake.
This was the privilege of purebloods, a law the ancestors had to follow to protect their pureblood descendants.
It was also the main reason why Frans valued these pureblood offspring so deeply. And only purebloods had the chance to peek beyond the Saint Rank.