With Planeswalkers, legendary creatures and artifacts in your deck, you want to make sure your deck stays safe from damage
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
3 Altar Of Dementia + Jumbo Cactuar Who Needs A Deck
When Bill the Pony enters the battlefield, you get to make two Food tokens, an effect that has tons of potential with token-based decks
Heroic is worth a permanent Giant Growth on Centaur Battlemaster, and the exalted Rafiq of the Many is a magnet for pumps
He's in about 50% of the decks that Sram is in