Legacy Powerful old cards make this format a true test of mastery and your wallet
With some careful deck building (mostly playing some big card-draw spells you can cycle into with Unpredictable Cyclone to make sure you always have some cycling cards in hand), you should be able to mostly play your entire deck in a single turn by cycling, casting stuff (including card-draw spells) for free with Unpredictable Cyclone, drawing into more cycling cards, and cycling them to trigger Unpredictable Cyclone against and again until you've essentially cast your entire deck
Delirium is a grindy, yet powerful mechanic that takes some set up, but can reap you some sweet rewards
Once the Creative team came up with the idea of Rakdos being the muscle for Oko's gang, there was no going back
More recent cards like Lolth, Iymrith, Lier, Avabruck Caretaker, Toxrill and even Hullbreaker Horror all allow opponents clear windows for interaction
March 24, 2023 Q&A [ST-09] has been released