Martas Final Weapon "Kismet" - How to get it?

On many sites it says that you can only get it by killing the boss in Gladsheim (dropchance 5%). Is this the only way to get it?
Because I read that it can be in treasure chests in Gladsheim at 7F and above. If so, can anyone confirm that?

Far as I know only the boss drops Kismet. The chests will give you Trick Bind instead.

Yup. And I was lucky. That and stacking the Itemfinder skills on a monster helps:

5% x 2 = 10 x 3 = 30 x 5 = 150% It's almost guaranteed.

Do the monsters have to be in battle for the itemfinder skills to be active ?

First, is that a Carly Carmine avatar?
Second, Probably.

Be warned.

1. As noted, you can only get this weapon from the final boss in Gladsheim.
2. The boss is Level 300!

I had to look who that is and nope it isn't.
My avatar is my own char.

Well would make more sense to have the monster in the team for the effect to be active.
Isn't gladsheim only avaible from the second run on anyway?

Sure is.