You can try this :

4 Savannah Lions
4 Goyf
4 Gaddock Teeg
4 Sword to Plowshares ----> creature removal
4 Thorn of Amethyst ----> disruption
4 Watchwolf

3 Isamaru
3 Kataki ----> artifact hater
3 Jotunt
3 Orim's Chant ----> time walk

2 Umezawa's Jitte

4 Winsweept Heath
4 Savannah
4 Horizon Canopy
2 Temple Garden
2 Plains
2 Forest
1 Black Lotus
1 Mox Emerald
1 Mox Pearl
1 Lotus Petal

Sideboard :

3 Null Rod
3 Tormod's Crypt
1 Orim's Chant
1 Balance
3 True Believer ------> Tendrils
4 Kami Ancient Law -----> Oath


If you affraid of Engineered Explosive....you can Maindeck Null Rod..

Hello...Sorry if my English not so good...

I have tested some Stacks deck and I hope We can share any idea here...

For MUD, I prefer Orb of Dreams than Uba Mask...Have u tested it ? I think it is a good option...It can slown down enemy's fetch land, ichorid and moxen...

The List deck that I've played is like this :

4 Mishra Workshop
3 Ancient Tombs
3 City of Traitor
4 Wasteland
1 Strip Mine
5 Moxen
1 Black Lotus
1 Tolarian Academy
1 Mana Crypt
1 Sol Ring
1 Mana Vault

4 Metalworker
4 Chalice of the Void
4 Smokestack
4 Tangle Wire
4 Sphere of Resistance

3 Bottle Cloister
3 Orb of Dreams
2 Crucible of the World
1 Duplicant
1 Triskelion
1 Karn, Silver Golem

1 Trinisphere
1 Memory Jar
2 Powder's Keg

Sideboard :

3 Tormod's Crypt
3 Damping Matrix ----> Welder, Viashino Heretic
2 Duplicant
2 Razormane Masticore
3 Blasting Station -----> Oath


I like that deck, but after some test....I realize that the mono grey Stacks have some problems...

The problems are :
1. Hard to answer 1st turn Welder in the apponent's field...
2. Hard to play against Fish ( Null Rod, kataki, meddling )
3. After sideboarding, there is a nightmare ( Energy Flux, Shattering spree)

The benefits are :
1. More consistent
2. A lot of disruptions and locks