A lot of the cards are sub-1$ cards, though
With Thoughtseize, Fatal Push, and a suite of efficient disruption, Orzhov Blink can adapt to a wide range of matchups
Snow is a supertype, so we don't have any reason to build Omo around cards that synergize with Snow-Covered lands
However, its in Arthurs ability that he truly shines: when played, he can give a chosen character Challenger +2 and Resist +2 (that means they get +2 Strength while Challenging and a reduction of 2 damage thats being dealt to them), plus they can also challenge Ready, not Exerted, characters on the same turn too
Jund: With Jund, you have two main options: first, you can embrace the ramp theme, improve the finishers, and play a good-stuff / ramp deck
Because the one-shot effect that returns the cards isn't an ability that goes on the stack, it won't cease to exist along with the leaving player's spells and abilities on the stack.