Hi all. I usually played mud, and still do. i also played rug threshold back in the day and can now again. Thats said, i also enjoy this deck archetype. I thought id post my list and see what more experienced players thought about some of my more non traditional additions. Here goes.

Deck: Legacy UBW Landstill.dec

Counts : 60 main / 15 sideboard

Creatures:3
3 Snapcaster Mage

Artifacts:8
3 Chalice of the Void
1 Chrome Mox
2 Mox Diamond
2 Crucible of Worlds

Sorceries:4
2 Hymn to Tourach
2 Toxic Deluge

Instants:17
2 Counterspell
4 Daze
2 Diabolic Edict
4 Impulse
1 Intuition
4 Force of Will

Enchantments:3
3 Standstill

Others:3
1 Liliana, the Last Hope
2 Jace, the Mind Sculptor

Lands:22
1 Creeping Tar Pit
1 Flooded Strand
3 Island
4 Mishra's Factory
4 Polluted Delta
2 Swamp
1 Tundra
2 Underground Sea
4 Wasteland

Sideboard:15
1 Vendilion Clique
1 Helm of Obedience
1 Celestial Purge
1 Disenchant
2 Zealous Persecution
2 Mindbreak Trap
1 Submerge
1 Seal of Cleansing
3 Leyline of the Void
1 The Abyss
1 Narset Transcendent

I believe that the intuition mb could also be another liliana the last hope with fewer abrupt decays in the meta, and could see another edict sb as well with all the sneak and show.