I'll impart some of my insight with my own experience with trading especially on etiquette and processes of trading with other players (No, we are not engaging with scamming people out of their high value cards and I am not delving too deeply into MTG finance)
I just felt obliged to point out that I own Brandon Bozzi with this card
Magneton's second move is called Electro Ball, for three energy cards, two colorless and one lightning, this move does 70 damage, however you must discard an energy attached to Magneton after using
A Trainer's Smeargle appeared in One Journey Ends, Another Begins
Super Pre-Release Monkey D
This mount even comes with its own counter-doubling ability if you saddle it, which isn't very hard to do, and can just target itself to make it an even more threatening creature