Find the cards with permanent scaling, infinite scaling, or % damage. So for 7.9, that I'm aware of:
GLA: Gladiator's Cunning, Freya The Slayer
FAI: Fairy Fire, Fairy Witch, Fairy Finale
DRK FAI: Augmented Corruption, Dark Fairy Queen (questline)
MACH: A.E.R.A./E.L.U.N.E/Upgrades (questline)
ZOM: Hooded Corpse, Zombie Swordmaiden, Xhelzus The Necrotic, Everlasting Zombie
SUC: Belial The First, Zekari Massacre Specialist (questline)
GAM: Poker Face, Snake Eyes
SPACE: (Elite) Space Force - Athena, (Elite) Space Force - Arabella
GAL: Galactic Hive-Mind (token), Galactic Size Mage, Galactic Doombringer
DEMON: Demonic Decay, Blood Pact?
PARA: Parasitic Magus, Yogg'Saron Parasitic World Eater
COV: The True Witch (multiple cards), Creeping Miasma
CULT: Ritual of the Goddess (Baal questline)
VORPAL: Izel - Ultimate Warrior, Vorpal cards in general
OTH: Devorah The Insatiable