I'm pretty high on MUDs placement in the current meta. So much 4c control and other control variants. There are definitely things to take into consideration that give us fits, but walkers, disruption, and prison pieces are all very good right now. I'm not sure I'm taking MUD to the upcoming 20k. But I'm seriously thinking about it. Imma include my current list below. Be happy to discuss my choices with anyone who's interested.

Deck: Legacy Colorless Mud Friends 1-14-20.dec

Counts : 60 main / 15 sideboard

Creatures:8
1 Walking Ballista
4 Thought-Knot Seer
2 Golos, Tireless Pilgrim
1 Ulamog, the Ceaseless Hunger

Artifacts:19
4 Chalice of the Void
1 Manifold Key
3 Grim Monolith
2 Sorcerous Spyglass
3 Sphere of Resistance
2 Ensnaring Bridge
1 Trinisphere
3 Thran Dynamo

Others:8
4 Karn, the Great Creator
2 Ugin, the Ineffable
2 Ugin, the Spirit Dragon

Lands:25
4 Ancient Tomb
3 Blast Zone
1 Cascading Cataracts
2 City of Traitors
4 Cloudpost
1 Crystal Vein
4 Glimmerpost
1 Karakas
2 Thespian's Stage
3 Vesuva

Sideboard:15
1 Walking Ballista
2 Faerie Macabre
1 Golos, Tireless Pilgrim
1 Razormane Masticore
1 Tormod's Crypt
1 Sorcerous Spyglass
1 Ensnaring Bridge
1 Bottled Cloister
1 Mystic Forge
1 Batterskull
1 Mycosynth Lattice
1 Spine of Ish Sah
2 All Is Dust