Number 44 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (7/1/2012) Battle of Wits has an "intervening 'if' clause." This means that if you don't have 200 or more cards in your library at the beginning of your upkeep, the ability won't trigger
Counter target spell unless its controller pays
While it's not great as a Rogue Tribal commander since 1) it doesn't really support Rogue Tribal 2) its "roguejutsu" requires Zareth to be in your hand, not command zone, Zareth is still a great card in the 99 of Anowon, the Ruin Thief since his combat trigger is absolutely brutal, basically a more flexible Ink-Eyes, Servant of Oni trigger
The card advantage swing is wild
At the time of the promotional cards release outside Japan, all Gengar ex cards from which Mega Gengar ex could evolve had been rotated out of legal tournament use