i played with nom nom a few patches ago,
it used to require three people,
you can spawn it as the leader (at least works if everyone else has it finished, not sure if not completing req will cause no spawn).
it is a run around and find objective (reminds me of shamans + horde combined).
it used to be a good way to farm drops but it got nerfed back when bridging was still a thing, so no idea how useful farming is.
(im working off shoddy memories, i could be mistaken and patches may have changed things, but thats the best i can do)