Use Opposition Agent and Aven Mindcensor, along with the general lack of basics in the format, to maximize value from Path to Exile, Assassin's Trophy, Boseiju, Who Endures, and turn Ghost Quarter into Strip Mine. NicFit shell using Veteran Explorer to go with the theme.
Green Sun's Zenith to fetch silver bullets as needed or finishers once you have a stable board state.
Collector Ouphe and Knight of Autumn can shut down artifacts or problematic enchantments.
Scavenging Ooze and Endurance can target graveyards.
Grist, the Hunger Tide can take out opposing creatures and gives general value.
Shifting Ceratops blocks Murktide Regent all day.
Ramunap Excavator, Knight of the Reliquary, and Titania, Protector of Argoth give you further value on the land theme, returning your LD and fetches and rewarding you for cycling through.
Crop Rotation and Knight of the Reliquary also give a way to grab any needed lands, including Karakas, Field of the Dead, or Ghost Quarter as needed.
Beat down with your little creatures when you can, or establish a dominant board with tokens from Field of the Dead or Titania, Protector of Argoth.
With UR Delver being the prominent deck in the format, the main board has lots of ways to eliminate creatures and target problematic cards in graveyards. Endurance blocks Insectile Aberration
and Dragonrage Channeler, while Shifting Ceratops in particular blocks Murktide Regent.
Assassin's Trophy is generally a powerful card against lands, and Karakas and Path to Exile can stop Marit Lage if needed.
Stompy or Prison decks that get off to a fast start could be problematic, but if we can get some blockers in play we should be able to stabilize and outvalue them. (Even though they are a mono-colored deck, they also don't tend to run very many basic lands.)
Fast combo decks like Reanimator, Storm, and Doomsday are likely going to be strong against the main deck unless they get a slow start (if we have time to get some of our hate cards in play, a well timed Endurance or Opposition Agent can shut down combo, but they're both 3 drops).
The sideboard has copies of Leyline of the Void and Surgical Extraction to focus down graveyard based decks or remove key combo pieces, and Mindbreak Trap to stop an early win.
The deck I'm most worried about is Death and Taxes. As a mono-colored deck with minimal utility lands, D&T is strong against our basic game plan. It is likely going to come down to who can get the right removal at the right time. In the main board, Collector Ouphe shuts down their Aether Vial and Path to Exile removes the creature equipping Kaldra Compleat.
In the sideboard, Pernicious Deed gives us a reset button (and leaves our Grist and larger creatures on the board). I want to try Spore Frog as another sideboard option because: I really like the card, Meren of Clan Nel Toth makes it a repeatable fog, and it denies lifelink and counters on Umezawa's Jitte.
