Here's my initial rough draft.
4 Stitcher's Supplier
3 Carrion Feeder
1 Putrid Imp
3 Hermit Druid
3 Hogaak, Arisen Necropolis
2 Collector Ouphe*
1 Demonic Tutor
4 Cabal Therapy
4 Bridge from Below
2 Altar of Dementia
1 Black Lotus
1 Mox Jet
1 Mox Emerald
2 Bloodstained Mire
3 Verdant Catacombs
4 Undiscovered Paradise
4 Bazaar of Baghdad
3 Veil of Summer
4 Leyline of the Void
2 Assassin's Trophy
2 Maelstrom Pulse
2 Collector Ouphe*
2 Seeds of Innocence
*: Numbers/card choices adjusted as needed.
(1) How do we win after we activate Hermit Druid?
-cast a Cabal Therapy via Hermit Druid to clear the way;
-Trigger Multiple Bridge from Below
-Convoke Hogaak, Arisen Necropolis twice
-Trigger Multiple Vengevine
-Trigger Multiple Bloodghast
-Alpha Strike (due to Anger)
(2) Is Altar of Dementia too cute? Do we just want to run the full set of Collector Ouphe in the main instead?
I started scouring the internet and found several articles involving Hermit Druid.
I have nothing substantial just yet to conjure a draft, but it might help continue to get the ball rolling.
I notice only 14 blue cards (14 main, two sideboard) in your list. Is there a problem with supporting blue for Force of Will with such a small number?
I was originally basing the number of Force of Will I could play by the old calculation: 4 blue cards for every 1 FoW.
Does this apply here?
Should this rule still apply?
I recall talking to Adam about card choices, and he commented about how he could also utilize Teferi, Time Raveler to 'break his landstill', cast relevant spells, and then recast Landstill to finish the turn.
He was having a blast with the list!
I piloted the Hogaak list, and I think it has some legs - especially in the post Mental Misstep / Mystic Forge / Karn world we live in now. It needs more tuning though.
That would definitely mill yourself completely out!
But what would your endgame position look after that?
I'm not too familiar with Hermit combo.
If we consider incremental growth, then Stitcher might be the method still since you can use it to recur Gravecrawler (triggering Vengevine) as well as continue more incremental mill with the use of Cabal Therapy/Carrion Feeder (which cascades into trigger Bridge from Below).
I do wonder if the Altar of Dementia Combo is 'too cute' and that we should just go with an aggressive beatdown plan with main deck answers.