Quote
The vitality of the necklace he held filled shortly with a little aid. The Death Knight has finally announced his intention to yield.
“Master!”
The Lone Death Knight! The strongest Death Knight, Van Hawk, recognized Weed as his master. However, Weed’s answer was unexpected.
“No, I cannot trust you. Since you are the servant of the evil warlock, you must be planning something!”
“No, it’s not like that…”
Weed did not listen to the Death Knight and killed him another 300 times.
“I will serve you master, so please…”
Even after he heard this, he killed him about 500 more times.
From then on, whenever the Death Knight appeared, he appealed desperately, but to no avail. Weed’s goal was to help master his skills, so there could be no mercy.
Guy found a summoning necklace but the summon needs to be killed repeatedly til he follows/obeys you.
This is an excerpt after about 50 kills in.
His reason for killing the summon is to raise his sword mastery skill and endurance from being attacked.
If this interested you, the light novel is legendary moonlight sculptor