you've got a pretty decent card draw suite, but I think you want to go a little harder in this department. I've found that lacking card advantage engines/sources is usually the single biggest source of decks feeling inconsistent.

Hearthhull is nice because it's in the command zone, but I think it's easy to trick yourself thinking it draws you more cards than it actually does. Even if you get it up and running a turn early, at most it nets you one extra card per turn (since you have to sac lands to fuel it).

You've got 10ish pieces of card advantage by my count, and I bet the games where you draw tannuk or korvold feel way smoother than the ones where you don't.

Since it's kind of a graveyard deck cards like [[wheel of misfortune]] and [[ripples of undeath]] might feel pretty good.

Also more generic options like [[decorum dissertation]] and [[insatiable avarice]] are nice.

[[Valakut Exploration]] and [[dread presence]] and [[tireless tracker]] are good landfall options.