Hi Mark, premier sets typically have only one cycle of multicoloured cards at lower rarities, usually uncommon creatures for the draft archetypes. Why is that?I feel like simple and fun cards like Electrolyze or Growth Spiral are now only printed in multicolour sets because of this "one cycle" restriction.

The restriction doesn’t come from having a default number of cycles. We only put multicolor cards at common when there’s a mana base to support it, which usually only happens in multicolor sets.

Supertype Izzet also means that it becomes basically impossible to reprint, for example, Electrolyze.

The inconsistency with old Ravnica cards would cause numerous problems.

Couldn't you argue (not well) that you're both gaining life and paying it to draw with Electrolyze?

Just because you can technically do something with a color does not mean it fits colorpiewise. This is a hard concept for many players to grasp, Blue can put things on top of the library. Blue can exile mill the top of the library. That doesn’t mean blue gets to exile permanents on the battlefield.

"Decking the opponent, for example, comes up much more often than needing to sacrifice a creature to fizzle a creature destruction spell with a secondary effect." This is definitely untrue in the games that I play. I'm primarily a Commander player and fizzling 2 for 1 value removal like Warleader's Helix or Electrolyze comes up way more often than decking.

Reading over the comments, I believe my statement was false. That said, I don’t believe it’s important for the game to make it easy to fizzle spell effects attached to kill cards.