2 Runo Stromkirk Lord Of The Deep Big Set-Up, Huge Payoff Runos in a weird spot since its none of the relevant KLOS creature types itself, isnt particularly good on its own, and adding black doesnt give you access to any additional KLOS creatures of note
The illustrator for this piece, Toshinao Aoki, actually also did a Special Illustration Rare version of Sandy Shocks ex for Paradox Rift and both cards have their signature clean and simple style at the forefront
Either dealing noncombat damage or drawing a card, you can then ping down your opponents in instances of 1 damage for each card you have left in your library
Since you generally only have a small number of creatures, Silent Arbiter keeps you safe from a large field of creatures swinging at you
Plus, its always good to get some extra benefits from discarding a card
Same logic as to why post sideboard matchups are more important for all decks that don't go to time on the round