- Games - RPG ## The Industrial Revolution is the reason RPGs have area-of-effect spells: A PC Gamer Causality Chain™ Spl-ASH damage. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. - Copy link - Facebook - Reddit - Pinterest - Flipboard - Email Causality Chain is a series at PC Gamer exploring the unlikely links between history, culture, and videogames. Every time you cast a meteor spell in Diablo 2 or a cloud of daggers in Baldur's Gate 3, you are taking part in a chain of history—a causality chain, if you will—that dates back to the…