Which format is the best one to start off with once you know the rules
Inquisition of Kozilek does its best work in Eternal formats where the formats speed forces decks to play the most efficient cards possible
Though it does invoke tension between catch-up cards and ramping, youd almost always rather ramp ahead on land drops and then have a vanilla creature, than be behind on land drops
Notably, while several cards are getting their first foils here, Sefris of the Hidden Ways is actually much easier to find in foil than nonfoil, simply because it was a commander in an AFR Commander precon
While only available in Collector Boosters, it could be found in boosters of any language, though the Mana Foil cards are always in English
This drop is especially useful for Commander players interested in building a Cat tribal deck, as the cards included are all must-haves