Mafia 67. Heart of the Void

I almost didn't understand anything. "A decaying, cone-shaped dwelling" can't be a clue? Cassi, of course, is Envy, waiting for the flying creatures to fall, like fish in a picture.

Maybe. By the way, what is "tati" anyway?

It's a Japanese sword, you can find it on Google. Intuitively, it seems that the clue is more likely to be a tati than a horse. But it's not a fact. And yes, I didn't quite catch the hint about Mona's role.