Six mana for a 5/5 flier every turn is already worth the price of admission, but milling two and having said Demons draw cards
Since affinity reduces Krang's cost so much, there's a line where you play it, then bounce it to your hand with cards like Boomerang Basics and Crystal Shard to up the storm count further
Multiple tournaments, both in-person events like SGCon and online, such as Magic: Online Challenges, all have tons of Izzet Cauldron decks taking up the majority of the metagame share
STEELBURR CHAMPION Another creature with Offspring here, so you could potentially have two
Green can actually draw large amounts of cards with something like Rishkar's Expertise, but an unmitigated draw-seven just isnt design space that white or green currently has access to
In addition, by combining the cards of OP-18 with the upcoming ST-37/38 in December, new players have a chance to compete at the highest levels