This Pokmon card is worth considering as only 122 cards on record have PSA 10 grades
Theres some decent stuff for our package already, but also some cards which are more relevant to the Heroic ability, or just generic green staples

Abyssal Specter Aggressive Sabotage Ana Battlemage Balor Banshee of the Dread Choir Barbed Shocker Blazing Specter Blightning Blim, Comedic Genius Blizzard Specter Cabal Slaver Carnival // Carnage Carnival // Carnage Cephalid Coliseum Chandra Ablaze Chaos Balor Chilling Apparition Cloak of Confusion Collective Defiance Creepy Crawler (playtest) Crosis, the Purger Cult Guildmage Davriel, Rogue Shadowmage Demonic Pact Dimir Cutpurse Doomsday Specter Dragon Mage Dreamstealer Driven // Despair Driven // Despair Elder Mastery Entropic Specter Everything Pizza Fell Flagship Fungal Shambler Guul Draz Specter Haunted Cadaver Headhunter Headless Specter Hellhole Rats Helm of the Ghastlord Hollow Specter Hypnotic Specter Immersturm Skullcairn Incendiary Command Jagged Poppet Kardur's Vicious Return Khorvath's Fury Kolaghan's Command Land's Edge Larceny Lightning Skelemental Liliana's Reaver Lyzolda, the Blood Witch Avatar Mardu Charm Megrim Memory Worm Mental Vapors Mind Bomb Mindstab Thrull Mishra, Lost to Phyrexia Needle Specter Neheb, the Worthy Nicol Bolas Nicol Bolas, Planeswalker Nicol Bolas, the Deceiver Odylic Wraith Okiba-Gang Shinobi Oona's Blackguard Order of Yawgmoth Orzhov Racketeers Ozai's Cruelty

Blue and Red are just great at artifact support, this slides into a lot
The Emerald Ink type is well balanced between Hero and Villain characters, at least in The First Chapter, with seven Heroes and six Villain glimmers in its selection of 34 cards