Mulligans
General Mulligans
The deck has a pretty intensive mulligan tbh because you need both early corpse generation as well really wanting to see lesser spinel spellstone because it's really strong if you can actually fully stack it by starting with it on turn 1.
Aggro Mulligans
Don't hard mull for this but it's a good keep and buys you a couple to a few extra turns on it's own vs. aggro.
Combo Mulligans
Blood Tap is also good vs. combo but I would consider harmonic metal maybe just a bit slow vs. modern combo? I could be mistaken.
Control Mulligans
You are fine to keep your slower hand buff options vs. control.
My current Handbuff DK build. I’m not on a lot of new cards but dreadhound handler is definitely a very helpful card to our overall strategy. The deck is still very conflicting to be honest. Especially the fact that being rainbow feels so weird. I’m running defrost because I definitely notice we have card advantage issues but I would love to run a good 2B or 2U card there are just none for this archetype. Plus I would still play rainbow seamstress even if it just gained rush and lifesteal so I wouldn’t really be missing out on that. Overall, the deck can put out some huge stats, but modern control decks often do not care about the stats of the units they are killing/frost novaing for six turns in a row.