Ryu dropped a corpse from his hands, another worthless genius falling by the wayside, and yet another he didn't bother to turn into a Corpse Puppet.
Though the concentration of high-level geniuses was greater here, this wasn't enough for Ryu to take an interest in a person.
He either needed a powerful Dao Heart to care to turn them into a Summon, or they had to have an interesting enough path to be worthy of becoming a Corpse Puppet. He wanted something that stimulated both his anticipation for the future and his creative juices.
Ironically enough, the higher level these geniuses were, the more rigid the paths they followed. They almost felt like cookie-cutter creations spit out by their Ancestors, one after another, with hardly any variation between them.