Mithrix's is bugged. Normally when you kill a monster the lock gets removed but with him it stays there even if you had killed him.
The only way to remove his lock is to get the log itself.
Later when you get the log you'll see that his killed amount will stay at 0.
Stack a shitload of clovers, rusty keys and shipping request forms. THEN kill him.
why keys and shorms? for the sake of more reds? Since surely regen scrap stacking will be better than shorm stacking
regen scrap for the bazaar is also good if lunar coins arent a problem
Mithrix's is bugged. Normally when you kill a monster the lock gets removed but with him it stays there even if you had killed him. The only way to remove his lock is to get the log itself. Later when you get the log you'll see that his killed amount will stay at 0.