One of the best options is Acolyte of Bahamut, which lets you discount Dragon spells since Dragons have a lot of attack triggers and Karlach provides extra combat steps
Examples include the FFXs Farewell or Protection Magic, Tifas Lightning Greaves, and basically anything with Cloud, like Arcane Signet 0333, Dispatch, or Clever Concealment
Historic Historic is a new game mechanic which refers to any card that has the type "legendary," "artifact," or "saga." I don't know why a Trusty Machete has the same historical significance as Danitha Capashen, Paragon and Fall of the Thran, but it makes the mechanic less narrow so I guess I'll take it
Tame those artifact or enchantment decks by choosing to destroy either type, or both
If all that weren't enough, Seasoned Pyromancer remains useful even after it reaches the graveyard
Additionally, there's no real reason to play this card when Three Steps Ahead is already so powerful, and only sees a max of one or two copies in current Azorius Control lists