Covalence: When and Ancient device bonds John and Cam together physically, it’s their emotional well-being put on the line (Cam/John, NC-17, 43,840)

I like how the Ancient-device-magical-bonding! trope is used to highlight both John and Cam's communication problems, and the dubcon aspect is also really well done.

[I'll probably be back here to add more, but this is a tab I have open *g*]