It see play in 3 formats: Premodern, Commander and Brawl
It trades life for cards through effects like Necropotence , Ad Nauseam , and Griselbrand , allowing massive card advantage when life totals are managed carefully
It means you would rather delay making Courser on curve making it weaker three drop than you might like
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Thats already card advantage, and your commander just stays on the table if your opponents dont have artifact removal, threatening all manor of infinite combos, and sometimes even attacked as a large threat
Skittering and creeping across the battlefield, spider creatures have been the backbone of greens answers to flying creatures since Urzas Destiny