You have 9 lands that can search/create blue mana and 0 blue spells. Then you have 11 white spells and only 2 lands that can produce white. You need to switch that up. Add a couple of Godless Shrine and/or Sacred Foundry. You need a way to search for a plains when needed. Other than that, this deck has some potential.

thanks budlaorf, the manabase is copied from the deck 'Grixis Crawler'. I have now adjusted the mana base- I am now starting the testing

There is defo something here, it just needs more refinement.

I really would suggest a manland in the vein of Mutavault. It has synergy with Cryptbreaker and Gravecrawler, as well as being a creature who can keep crewing copter for 2 who doesn't die to sorcery speed removal or decay.

Thanks LeaPlath, the problem with Mutavault is the mana commitment of the deck. I could see one in the deck as an additional land replacing one of the Cryptbreakers or a Lightning Bolt.

Interesting setup. K-command will help with the affinity matchup, but I'm trying to figure out where it'd fit. Personally, I'd swap the scullers for Rotting Rats, freeing up some space with the Faithless Looting self discard for more hand disruption- likely 3 rotting rats, a Nezumi Bone-Reader 2 k-command and 2 thoughtseize in the looting/sculler slots. It might not suit your meta, as you've already cut the higher cost card slots.Eidolon of the Great Revel/Nether Traitor/Shared Animosity/Topplegeist might work more solidly if you're planning on rushing your opponent down before they can react to all the disruption, but its super gimicky and loses out to exile effects.All told, it looks like a really solid attempt at that low cost Dark Confidant/discard aggro archetype, and I can't really suggest any flat upgrades. It feels like it could abuse sacrifice effects, even just to dodge path, but I'm having trouble finding a slot for Greater Gargadon. Really nice setup +1 Keep tinkering.

thanks lagotripha for the Input! You might have a point with the 'Rotting Rats' - even though it's not a particularly good card as such - there is probably too much synergy to ignore. Especially since I have recently reduced both the 'Cryptbreaker' and the 'Smugglers Copter' Count, there are now games when bloodghast Needs to get casted. So more discard outlets are very much wanted.

Something I have learned though: with 4 Bloodghasts and 4 Gravecrawler you need to be as aggressive as possible. Thats why I dont think Nezumi Bone-Reader fits in there, he is not a Zombie and he doesnt help to evade Path to Exile. Early on I have also tested 'Nether Traitor' but he seems overall just too slow. Shared Animosity is a very interesting card, I havent considered it but I might test it.

What do you think of the Sideboard?

Prized Amalgam and more Liliana seems good. Cool deck!

Thanks Stephen, I have been brewing with 'Prized Amalgam' back and forth. The fact that he can't be cast with this manabase IS a problem even with that many discard outlets. A second 'Liliana' might indeed be worth an inclusion- probably over a 'Tidehollow Sculler'?

This type of deck can make very good use of Smallpox. Could be something worth trying out (maybe that's not the direction you want to take the deck idk.)

Great looking deck, nice results, too.

@bigshocka

thanks plenty! Still working and testing on it

@Alexasmao

I would love smallpox to work, but it has negative synergy with Crawler, Cryptbreaker, Tidehollow and testing showed its not worth inclusion. I dont particularly like Liliana in this deck and I am currently testing Mask of Memory instead but it seems like Lili is still the way to go. My testing has showed me that I need about 12 Cards with discard for bloodghast to work in first place...

I would also love Fiery Temper over Bolt for more card Advantage but it unfortunately prooved to be too clunky and too slow. I rarely loose because of missing Card Advantage but more often because of speed, so Bolt it is...