What is the object of the prepositional phrase
along with...in this sentence,
I was in the first wave of implementation, along with eighteen million other vampires, witches, ghouls, werewolves, feral youth, and the like.
Is the object all the things together or each thing individually.
In other words, are there eighteen million ghouls or are there eighteen million creatures altogether?
If you substitute “wave of implementation” with “Group” then you can see that the preposition refers to that group. This group is the 18 million.