Pick Red/Black Garp if you want to learn counter decisions through a defensive style in casual play (it's out of Standard rotation, so it won't scale to locals or regionals)
If you want the analogy, its way too easy to use double your mana on instants
Speaking of hand disruption, its also great to side more of this in against Azorius Control
Two other cards, Boggart Shenanigans, and Goblin Bombardment work hand in hand with the Snoop combo and other sacrifice mechanics to generate damage on the side
This one is a finisher, something you might want to hold on to until your team is nice and pumped and you stand to get in for a ton of damage through a board stall
This transforming planeswalker knows Izzet cards well, and is hard to beat as an excellent commander and that's saying a lot for this color pair with a ton of competitive options