Perhaps, but I created Lagos before I started giving Mort ambrosia. And I wasn't even sure if I could create a Chthonic Companion, much less if I could give one to a mortal and have the bond form and work.

[ He's not trying to argue, but he's also taking in everything he knows is different. It's not as conclusive as not sensing death upon Ryo. ]

I've not felt anyone using the keepsakes or calling upon my power, so maybe I'm unable to make one to the standard of my mother.

[ He pauses and brings Mort to eye level. ]

... There's also the possibility that Mort has gained a new power from that place. He was more mobile then.

[ Leave it to Thanatos to believe that it's more likely for Mort to develop a new power than himself. ]