Kaza fills one of Izzet's weaknesses by essentially mana ramping for each of the most important pieces in your deck
Weakness: Fire (x2) Resistance: Grass (-30) Retreat: 3 Durant - Metal - HP110 Basic Pokemon [C] Bite Together: 20+ damage
Overall, if you pick good themes (popular character, limited availability, strong artwork) and hold through time, Japanese cards often offer compelling value upside
Molten Collapse will have to compete with Terminate for Rakdos decks in Modern, but the versatility of Molten Collapse is no joke
Mox Diamond ($1,119) Not classed as one of The Moxen, Mox Diamond is still pretty powerful and can be used to ramp out powerful cards before they should be in any fair game of Magic
Bloodbraid Challenger is close enough to Bloodbraid Elf to not stain the name, and at a mana value one greater, with the ability to escape, the Challenger hits differently and I'm OK with that