I'm still on my quest to build a decent junk loam deck.

I've based my latest version on a piece of advice that Lavafrogg gave me about replacing Punishing Fire with a 4th LOTV. Instead of LOTV, I opted for a couple of Liliana, the Last Hope to provide that inevitability. I also thought that Hobart's discussion on Grim Flayer was interesting so I've been play testing with it instead of Dark Confidant and I really like the card. I like the interaction between it and Liliana, the Last Hope second ability. These two cards are like peanut butter and jelly. I also like how it can set up a huge Knight of the Reliquary as early as turn 2 if you have a Mox Diamond in your opening hand as well.

Here is my latest version:

Creatures:12
1 Deathrite Shaman
1 Gaddock Teeg
4 Grim Flayer
1 Scavenging Ooze
4 Knight of the Reliquary
1 Ramunap Excavator

Spells:23
4 Chalice of the Void
4 Mox Diamond
2 Green Sun's Zenith
3 Abrupt Decay
2 Life from the Loam
2 Sylvan Library
3 Liliana of the Veil
2 Liliana, the Last Hope
1 Toxic Deluge

Lands:25
1 Barren Moor
2 Bayou
1 Cabal Pit
1 Dryad Arbor
1 Forest
1 Karakas
1 Maze of Ith
1 Savannah
2 Scrubland
1 Swamp
1 Tranquil Thicket
4 Verdant Catacombs
4 Wasteland
4 Windswept Heath

I may just be overthinking this whole thing. Junk Loam shows up often on Mtgtop8 running Collective Brutality in place of Punishing Fire. Maybe Collective Brutality is strong enough that you don't need a "reusable" card like Liliana, the Last Hope?