Feln Muckhanded Golem

Well, Muck and Mandevil are even now...
We have Tome + Kindro - not the main focus but people will fish for different answers if you play either of these first
Exploit - very good to make sure you know what's coming
Waxing moon is a card I love, pairs very well with harbinger and anybody really. Keeps the cards coming. Be careful if you play it with Moldermuck out as deadly will cause him to kill himself.
Market not super optimal, Last chance for Mandevil or harbinger for a last board wipe.
Silvercrest for those heavy spell decks
Stray into shadow for a decent board wipe, can probably become Fall to Ruin if you have them.
Solitude in case you manage to mill a decent amount
Vara's sanctum is probably the biggest flex slot, but can turn your single units into bigger threats, also wonky with moldermuck.