Usually these Pokmon have better skills and outclass others with their special abilities or unique attacks
I believe it is part of the radiant collection subset
These are extremely tough and powerful variants of certain 'mons that get a huge hit points boost over their non-mega equivalent, plus game changing abilities and devastating attacks - but pay for it by giving up three prize cards if your opponent can knock one out
But it's better as it also generates a token if you attack with a Goblin, with itself also being a Goblin for this trigger
It is possible that Ghost-type is truly a great type that just needs powerful moves and species, but even then Ghost-types suffer because their offensive interactions are too similar to Dark-types, which have far more neutral coverage and a wider selection of moves, both offensive and status
Invasion of Gobakhan might seem like a 60-card all-star, but its still amazing in Commander