Dark Return
x4
1
Permafrost
x4
1
Suffocate
x3
1
Twilight Raptor
x4
2
Annihilate
x3
2
Gorgon Swiftblade
x4
2
Lethrai Ranger
x4
2
Strategize
x4
3
Desperado
x4
3
Feeding Time
x4
3
Gorgon Fanatic
x4
3
Haunting Scream
x4
3
Lethrai Darkstalker
x4
Primal Sigil
x6
Shadow Sigil
x3
Amethyst Waystone
x4
Diplomatic Seal
x4
Feln Banner
x4
Seat of Cunning
x4
View Deck on Shiftstoned
You can also experiment a bit with Haunting targets, for example Memory Dredger or the new Vara if you got hands on the campaign.
Hope this helps :)
Short explanation of market. When you add a merchant in the deckbuilder, you'll see that a 2nd tab appear above your decklist. Click this and you can add 5 exclusive cards which will be stored in a market (or sideboard, if you're familiar with magic).
When you then play a merchant in-game, you can choose a card in your hand and replace it with one in the market if it has the same color as the merchant. Thus if you play just 1 type of merchant, all cards in the market should be that color for most flexibility.
However, you can also have merchants of different colors in the same deck. If a card there has multiple colors (like haunting scream) you can use either blue or black merchant to fetch it :)