The main differences to pay attention to with Light/Dark Pokmon is the aesthetic (Light Pokmon cards feature serene, heavenly art and Dark cards feature the opposite) and their attacks
Black Cat, Cunning Thief Common Crook The Death of Gwen Stacy Eddie Brock Gwenom, Remorseless Inner Demons Gangsters Merciless Enforcers Morlun, Devourer of Spiders Parker Luck Prison Break Risky Research Sandmans Quicksand Scorpion, Seething Striker Scorpions Sting The Soul Stone Spider-Man Noir The Spots Portal Swarm, Being of Bees Tombstone, Career Criminal Venom, Evil Unleashed Venomized Cat Venoms Hunger Villainous Wrath Angry Rabble Electro, Assaulting Battery Electros Bolt Gwen Stacy Heroes Hangout Hobgoblin, Mantled Marauder J
They have a lower drop rate in boosters and are usually worth a decent amount of money when sold to collectors
Creatures participating in combat are removed from it
Depending on the condition, secret rare cards can sell for $20 or more than $200 each
Using it in response to a kill spell can effectively counter it, permanents with protection can be very difficult to deal with, and there are a bunch more interactions out there to learn
