Barely any thought required, beyond which fantastic artworks or frames of pre-Innistrad bears you cant bear to not play
The world of Pokmon card collecting is vast, with some cards worth mere cents while others fetch thousands at auction
No one wants to pay the ward cost to get rid of him, and every time anyone casts a spell, you get another Amass trigger
If needed he can create a Ninja token to protect himself or keep up the pressure, and his ultimate is unsurprisingly powerful
Its also okay that they went for one set with Slimer in 1984, and then one set with The Real Ghostbusters, the animated version
Think about this for a second there are people out there who develop scripts specifically in order to maximize the number of trades that they see, in order to make sure that they are the first to be able to trade with a user if they have cards that they want