In Burn or Izzet Prowess, its the early drop that keeps pressure on your opponent while synergizing perfectly with Bolts, Baubles, and cantrips
I looked at the all, and I think I've played all but three of them at some point in time in my game playing days, as it's my 2nd favorite color combination to draft for Abedraft (a draft I have of every card ever printed save for around 15 that are too pricey to pickup)
Having a card thats incredibly good in Limited is usually a sign that it will be good enough for Constructed as well, although its not always the case
Arcane Denial is another huge card here
Similarly, why include a bunch of characters that bounce characters back to the hand when banished and a bunch of cards that heal characters
Pedagogy for the corpuscularly challenged is in the curriculum