+1 poison counters is potentially a lot, with swarms of Mites it's enough to kill someone in a single turn pretty easily
I browsed the Top Jeskai Commanders and eventually went back to the top of that list: Kykar, Wind's FuryKykar, Wind's Fury
5 Opposition Agent Nice Land You Got There Originally intended to combat tutor effects, Opposition Agent has made more of a name for itself as an answer to fetch lands
Im kicking things off with blue because its easiest for me
We have a four-mana kill spell in mono-Green (assuming you do it correctly, of course), then it pumps something, then it resurrects that same huge thing we used to kill the other thing
Some quality-of-life changes have been made to this version, though it's still the same game fans know and love