If you have one of the cheaper versions of Mega Lucario ex, its better to keep this one safe in your binder rather than put in your deck
In a deck that can untap it with the likes of Veteran Beastrider, you can attack freely while still taxing defenders and making it costly for opponents to send creatures your way
The rule states that players can't have more than one legendary creature with the same name, and if they do, they must choose one to keep and sacrifice the rest
For example, in the Combo vs Control matchup, Combo would dictate the game by going all out and try to close out the game as fast as possible, while Control would want to slow down the game in order to stabilize
You could choose to view it as a bad Grave Titan, but I'm sticking with "good Precinct Captain" and I'm going to keep a close eye on this card
This will be a breakdown of his winning list