λυκοκτόνος
From LSJ
ψυχῆς ἀγῶνα τὸν προκείμενον πέρι δώσων → to stand the appointed trial for his life, to stand the appointed struggle for life and death
English (LSJ)
ον,
A wolf-slaying, epith. of Apollo, S.El.6, Plu.2.966a, Porph.Abst.1.22, and v. Λύκειος; λ. φαρέτρη AP13.22 (Phaedim.). II λυκοκτόνον, τό, wolf's-bane, aconitum, Gal.11.820.