After that I would mix fetchlands with duals / triomes, the usual stuff
Adarkar Sentinel Arcbound Javelineer Arcbound Shikari Auton Soldier Emissary Escort Esper Sentinel Etched Champion General Traag, Heart of Stone Kavaron Harrier Magitek Infantry Mandroid Squadron Mechan Shieldmate Mister Gutsy Old Guard Patrolling Peacemaker Porcelain Legionnaire Project Deathlok Soldier Rock Soldiers Scrapwork Cohort Sicarian Infiltrator Soldevi Sentry Soldevi Simulacrum Soldier Replica Spectrum Sentinel Starport Security Steelswarm Operator Synth Eradicator Tapestry Warden Yotian Frontliner Yotian Soldier
and back then I think the idea was just to have 'horror' represent, well, Lovecraftian/Cthulhu monsters -- before M:TG began to use it as a stand-in for Phyrexian-corrupted monsters and a substitute for demon/devil
Plus, for a rundown of all the cards across the set and where you can find them, check out the Collecting Dominaria United article, which includes details on the Lost Legends cards
Invoke Prejudice easily stands out as one of the worst offenders for plenty of reasons
: Level 3 When this Class becomes level 3, target land you control becomes a creature with haste and "This creature's power and toughness are each equal to the number of lands you control." It's still a land