THIS IS 100% FREE AND IS PART OF OUR SITE SECURITY
With the wide variety of Demons in those colors, this wont be a problem
There are a huge number of cards that could be functionally reprinted with it: Abzan Charm , Ambition's Cost / Ancient Craving , Asylum Visitor , Baleful Force , Bloodgift Demon , Caress of Phyrexia , Champion of Dusk , Corpse Augur , Cryptbreaker , Curse of Vengeance , Damnable Pact , Dark Prophecy , Dusk Legion Zealot , Glint-Sleeve Siphoner , Graveborn Muse , Harrowing Journey , Hoarder's Greed , Kothophed , Liliana's Contract , Live Fast , Malakir Soothsayer , Metalspinner's Puzzleknot , Midnight Entourage , Mindblade Render , Minion's Murmurs , Moriok Replica , Night's Whisper , Ob Nixilis Reignited , Painful Lesson , Parting Thoughts , Phyrexian Arena , Phyrexian Gargantua , Phyrexian Rager, Promise of Power , Read the Bones , Sanguimancy , Seizan, Perverter of Truth , Sign in Blood , Skeletal Scrying , Succumb to Temptation , Toil , Vulturous Aven , and Wretched Confluence

Chalice of the Void (2019) The 2019 judge promo Chalice of the Void has a unique artwork that goes great with the foiling on the card
Even in terms of Grandeur commanders, this one blows, since theres almost no interesting colorless instants and sorceries
Mardu is mostly beatable, although, because of the powerful of their cards, you probably wont be able to make a deck that absolutely crushes it