Comparison of ASASSN-13dn spectra with those of type II LSNe studied in literature at different epochs. Left: ASASSN-13dn peak spectra with SN 2003bg (Hamuy et al. 2009), ASASSN-15nx (Bose et al. 2018), and SN 2016gsd (Reynolds et al. 2020). Spectra of SN 2017hxz, SN 2017hbj, and SN 2018eph are from Pessi et al. (2023). Right: Comparison of ASASSN-13dn secondary peak spectra with those of ASASSN-15nx (Bose et al. 2018) and SN 2016gsd (Reynolds et al. 2020). Spectra of SN 2017hxz, SN 2017hbj, and SN 2018eph are from Pessi et al. (2023). Phases reported in this figure are relative to the maximum luminosity reported in the references.