Hmm with a Mechanical welpling you could probably run Kangors army.
I would cut Archmage Vargoth, because he can backfire if you blessing an enemy minion, or Subdue one of your own... and Archmage Thalnos‘s deathrattle is probably something you don’t wanna have on the Undataker.
2
Even if it's after, you'll still half the damage you take from fatigue.
5
Neutral Frost Nova, mitigates fatigue (50% reduction at its worst iteration, 100% at its best) and in Priest it can be used to set up Inner Fire combos. Seems useful!
2
Captain Eudora
Legendary Rogue Pirate
1 mana 1/1
Note: themes are Unexpected Cooperation and Brand New Lands
Marrgle Gras
Rare Shaman spell
4 mana
Note: themes are Festival and Double Up.
Reddit username is also ME24saken.