My goal was to create a Hela deck where the Eponymous character can regularly survive to Turn 6.
Since the only way to guarantee this is to limit the discard cards to Coleen, Sif, and Black Cat, Hela isn't the powerhouse she is in full casino decks.
In order to boost her strength a bit, the deck runs Ebony Maw.
As a result, the deck also runs several cards that can add power to Ebony Maw's lane (including Captain Marvel, Shanna, and Dr. Doom).
Depending on your discards over the course of the game, Doom may actually be a better T6 play than Hela, which actually makes Sif a fairly safe play if Doom is already in hand (and completely safe when Death is).
The deck is still under development, but it does live up to the name. It is Hela safe.
[My personal experience is that this deck is Diamond to Vibranium tier]