There's Something Wrong with This Blind Box. Why Can I Smoke Anything?

Qin Han was accidentally bound to the [Weekly Blind Box System], and new abilities/identities are drawn every week. Face various top identities, abilities, and systems drawn out at any time! Qin Han thought he could hold on steadily. Until one day, a book of [Top Dual Cultivation Techniques] was opened in the blind box... Qin Han looked at the technique in his hand and fell into deep thought: System! Your blind box... Is the ingredients not quite right? ! "