This dude is a stud. This card cannot be traded, and is not affected by other players' card effects.
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Miguel Coronado • Faith and Fear
#26
| Weird West Edition
#176
Note that effects which change attachment (such as the ability on Luke ) do not count as trading, which allows this to move off of the inventing Mad Scientist.
Related, if a card effect allows you to bring this into play onto any dude, it does not have to be the Mad Scientist who invents it.