The fact that Izzet decks tend to be happy to play a high volume of instants and sorceries only solidifies this further
I also didnt run any colorless cards in Izzet, other than Secluded Starforge , which is a solid late-game option for building up a robotic army
Its not uncommon for red commanders such as Krenko, Mob Boss to have a stray Goblin Recruiter or Dockside Extortionist around to sacrifice and pay the cost for this spell, but the place where it will shine the most is in partner decks including Rograkh, Son of Rohgahh
Giving your opponent a card to make them attack somebody is too great a disadvantage, even if you get some mana
Shadow in the Warp is an insane card, even outside of this deck
Commander Ninjutsu is an interesting take on the ability