Nah people interpret that grimorie completely wrong. The warlock fancied his hunter friend and then tried talking to her about warlock-y things. Space magic and space lore and space dragons and the like. The hunter started to show disinterest so the warlock showed off and tried to impress her by saying neither the 'greatest hunter' nor 'brawniest titan' could kill them. The hunter had her interest spiked and 'took the challenge' but we don't know what happened since the Ahamkara were extinct by then!