One note here: be aware of the differences in play / draw
Not only does it create Zombies, but the more you have, the more you scry to find what you need, while also draining the opponent for even more inevitability
While it's tempting to add high mana creatures to the deck, you have to remember that since the draw is random, you may not be able to cast any creatures until late in the game (or at all, depending on your opponent's deck!)
For example, a planeswalker that normally enters with three loyalty counters on it will enter as a 3/3 creature and have three loyalty counters on it
Thats because instead of paying the mana cost for spells you cast, you can instead Collect Evidence 10
Brightglass Gearhulk tutors for not one but two cards, with a reasonable body attached, for just four mana