Looking at the Blue/Red Commanders, none of them seem to work particularly well in a chaos deck
Rare cards like this will usually increase in value over time, as long as there is still some interest in them or the game they are a part of

Advanced Search Sets Random Syntax Abhorrent Overlord Abyssal Harvester Abyssal Persecutor Ammit Eternal Apocalypse Demon Arbiter of Woe Archdemon of Greed Archdemon of Paliano Archdemon of Unx Archfiend of Depravity Archfiend of Despair Archfiend of Ifnir Archfiend of Sorrows Archfiend of Spite Archfiend of the Dross Awoken Demon Baleful Ammit Balor Be'lakor, the Dark Master Blade of the Oni Bloodcrusher of Khorne Bloodgift Demon Bloodletter of Aclazotz Bloodthirster Bone-Cairn Butcher Bothersome Quasit Bringer of the Last Gift Burning-Rune Demon Butcher of the Horde Carnifex Demon Chaos Defiler Chaos, the Endless Conductor of Cacophony Crabomination Daemogoth Titan Daemogoth Woe-Eater Death-Rattle Oni Defiler of Souls Defiling Daemogoth Demon Wall Demon of Catastrophes Demon of Dark Schemes Demon of Death's Gate Demon of Fate's Design Demon of Loathing Demon of Wailing Agonies Demonic Covenant Demonic Hordes Demonic Taskmaster Demonlord Belzenlok Demonlord of Ashmouth Desecration Demon Doom Whisperer Doomsday Excruciator Dread Cacodemon Dreadfeast Demon Dreadhound Dream Devourer Eater of Hope Embodiment of Agonies Enemy of Enlightenment Etched Host Doombringer Exalted Flamer of Tzeentch Extractor Demon Falco Spara, Pactweaver Feaster of Fools Fiendish Panda Frenzied Raider Goremand Great Unclean One Grinning Demon Griselbrand

To tell if a Pokmon card is fake, examine the cards texture, font accuracy, holographic patterns, and card back design
Rhystic Study eats a lot of removal and can be a tempo loss if your playgroup is prepared for it