Retainer's Hammer

 is a weapon in SINoALICE.

Weapon Story
I am your follower.

I am but your loyal weapon.

I am your follower.

If you order it, and they still breathe,

I will not hesitate.

I am your follower.

If you order it, I will kill both old and young in equal number.

"...Understood."

Following the hammer's order, the man painted his master in blood.