I was looking at the second video for map "Magical Ancient Weapons (G)" and I gotta ask, is this even applicable? When I've deployed Memento, the skeleton tokens have a number that tick down, which I've assumed always meant limited number of deployable tokens but that guy's able to spit them out nonstop. Am I missing something here?

Granted I've never been at a point where I used up all of the tokens given to me so I could be wrong but I wanted to ask in advance...also as a warning to anyone else following that pattern.