Mementos, Shadow Tunnels

When Mementos, Shadow Tunnels enters the battlefield or whenever you commit a crime, put a path counter on Mementos, Shadow Tunnels.

When Mementos, Shadow Tunnels has eight path counters on it, if you both own and control Mementos and an artifact named The Holy Grail, exile them, then meld them into Yaldabaoth, God of Control.

{t}: Add {c}.