"The remnant of the World-Exterminating Titan, in the early stage of Dou Dan Realm, with one hundred rules of condensing, the purchase price: two dragon-slaying crystals."

"Three-eyed family, in the early stage of fighting alchemy, two hundred condensed rules, purchase price: three dragon-slaying crystals."

"Eight-clawed Demon Dragon, in the early stage of Dou Dan Realm, there are three hundred condensed rules, and the purchase price is four dragon-slaying crystals."