Ark4n asked for my Dreadstill list and we talked about the issues with Ragavan on turn 1 -> Standstill on turn 2 -> your opponent just taps Karakas and you're screwed. This is why I use DRC in UR Dreadstill; that, and the 1-card delirium combo of Saga find Nought. The issue with Ragavan is that if it isn't able to attack, you suddenly need to fix the problem that makes it so you can't attack. Blue + Red is a really poor set of colors when it comes to being able to fix "Ragavan can't attack" problems; Daze doesn't always work and neither does Bolt. If you can't attack, you're probably also behind on board or out-stat'd, such that if you did cast Standstill, Ragavan can't necessarily win a no-blocking race (and he can't use his trigger to cast spells without donating oppo 3 cards).

Watch Ark4n's first league with the direction he went and it gets pretty ugly pretty quick, where his conventional cards often come into direct conflict with the Dreadstill stuff. Afterwards he cleans it up and goes down to singleton Nought & Standstill and puts Daze back up to 4 copies to maximize Ragavan cheese. The 1x Nought acting as more copies w/ Saga at least gives a reason to run Stifle. When you're this dedicated to cheese'ing Ragavan, you can get away with 2 questionable includes. The Saga stuff is pretty easy to answer with deck construction and SB choices, but the average legacy player isn't willing to abandon small-minded 1-for-1 magic, and that's who Saga beats.

Ragavan is ideal for a white splash as you're technically able to cast Prismatic Ending for up to 5 colors, and you have nearly-DRS levels of mana protection on an otherwise yolo-ish manabase of all duals, all weak to choke. Ending is a far better spell at turning Ragavan attacks back on, and you also get to play Karakas profitably. This mana advantage also makes it pretty effortless to derp out Expressive Iteration users who are going to struggle tremendously to untap with 2 mana producing lands, and also beat Daze....vs an opponent getting free Lotus Petals. So not really a Dreadstill deck so much as the ability to jank-out a bit off the back of a creature that will likely get banned. The presence of 4x Saga is a little more questionable than Nought and Standstill as it is a pretty easy concept to attack and shut down...and if you shut down Saga they have to draw through worse topdeck trinkets they couldn't tutor.