All in all, its fringe cEDH

Ancient Cellarspawn Apocalypse Demon Archfiend's Vessel Ardyn, the Usurper Aspiring Champion Be'lakor, the Dark Master Blade of the Oni Blood Speaker Bloodsoaked Altar Bloodthirsty Ogre Boris Devilboon Burning-Rune Demon Canonized in Blood Carnifex Demon Clavileo, First of the Blessed Dark Wings Bring Your Downfall Daxos's Torment Demon Bolt Demon of Dark Schemes Demon of Death's Gate Demon of Fate's Design Demon of Loathing Demon of Wailing Agonies Demon-Possessed Witch Demonic Counsel Demonic Covenant Demonic Embrace Demonic Rising Desecration Demon Dreadfeast Demon Graven Archfiend Great Unclean One Grey Knight Paragon Havoc Demon Hellcarver Demon Herald of Slaanesh Illusory Demon Infernal Vessel Inner Demon Inquisitor Eisenhorn Kaalia of the Vast Kaalia, Zenith Seeker March of the Canonized Master of Dark Rites Miasma Demon Mindwrack Demon Mold Demon Nurgle's Rot Ob Nixilis of the Black Oath Ob Nixilis, the Adversary Oni Possession Orca, Siege Demon Pestilence Demon Pink Horror Possessed Goat Power Word Kill Priest of the Blood Rite Promise of Aclazotz Promise of Aclazotz Promise of Power Rafter Demon Rakdos the Defiler Rakdos, the Showstopper Ravenous Demon Raving Oni-Slave Reaper from the Abyss Reign of the Pit Reiver Demon Rite of Belzenlok Rune-Scarred Demon Scroll of Griselbrand Shadowborn Apostle

I will probably bring Shu Yun, the Silent Tempest because the deck is very fun for me
I feel like it is a nice addition, but shouldn't go around it, since you want to focus on poison
A card might be more expensive in North America than in Japan due to import costs, language differences, and regional demand
While it offered some utility it was rare to entwine and rarer to be any good at all when just making a token