There are a number of cards I think have potential, but a lot is going to depend on rotation, potential bans, and how powerful the upcoming three Standard sets of this year will be.
With Vampiric Tutor, Demonic Tutor and Idyllic Tutor also being in this deck, it's more than enough to find all the combo pieces you need
It reads, Whenever Lord of the Void deals combat damage to a player, exile the top seven cards of that players library, then put a creature card from among them onto the battlefield under your control. While mill isnt likely to be your main strategy in a deck filled with Demons, the exiling is definitely nice
I used PLA+ Cherry Red and PLA+ Sky Blue for this print from a company that apparantly has their name blocked on Makerworld (check 3md presets for which brand)
So how had I so poorly judged the potency of my deck
Abilities say whenever ~ becomes untapped trigger