"Of course, saying 'ten consecutive summons yield five gold heroes'... for Duanmu Huai, it was just a saying.
After all, he only had one Saint Crystal Stone, which he might have obtained from beating up Rave, so in the end, he could only summon one. Although Duanmu Huai didn't have high expectations for the strength of these Heroic Spirits, it wouldn't hurt to try his luck.
Even though card drawing is routine in mobile games, Duanmu Huai had never seen it done in this game. Although Soul Walkers do draw Soul Cards, these cards aren't gathered through in-game purchases like mobile games, but rather, Soul Walkers can acquire them simply by encountering them in the Fragmented World.
Just like the several worlds Duanmu Huai currently possesses, if he wanted, he could completely summon all the students he knew from Manaria College, or the forest inhabitants of the Mistelina faction in the Borderland forest, as well as the angels from Holy City and Heaven.