凌战略一犹(yóu )豫(yù ),便吩咐旁人(rén )准备三十份绿(lǜ )萤草,不多时,绿萤(yíng )草(cǎo )送到,方陌开始炼制四品再生丹。炼制(zhì )四品再生丹的步骤和当初炼制二品再生丹(dān )步骤(zhòu )相差不多(duō ),将(jiāng )丹(dān )炉预热(rè )之后,按(àn )次序将药材分别投入丹炉,并保(bǎo )证每种(zhǒng )药材之间(jiān )的药性不互相(xiàng )冲(chōng )突,-十(shí )数种药(yào )材先(xiān )后投进丹炉,一股丹药的香味(wèi )飘了(le )出来,