chest quest "stun enemy with bash shield 300 times" can be trigger by hammer

[cobalt mirage]

first use bash shield stun an enemy, then keep hammer that enemy

i find this with green *4 level's cool_bat enemy

[stoic relic]

The hammer is refreshing the stun duration's time

That's why it counts

Also, correct me if I'm wrong but I think stunlocking (i.e what you're showing rn) is the intended method of completing this quest