toraimarai canal coffer key

[StarRealms]

trying to find out what exactly drops this key... I've visited 3 different web sites and they *ALL* listed different monsters for this... I spent like 3 hrs here last night hunting various things with no drop, and I was wondering if anyone could confirm something that they've seen drop a coffer key in toraimarai.

many thanks!

[Altabas]

I got mine from toramas (bettles), but they are like the stronger random monster there. Prolly squeletons around toramas drop it to.

[itazura]

if you go in the enterance in windurst walls, the higher level skeletons to the right of the enterance drop the key.
i got mine on the first key dropper. yay smn AF D:
good luck.

[Cedric]

The crabs drop it and they're horribly easy.