Expensive to cast and splashy

Ademi of the Silkchutes Alenni, Brood Recruiter Amazing Spider-Girl Ancient Spider Arachne, Psionic Weaver Arachnus Spinner Arasta of the Endless Web Araa, Heart of the Spider Astonishing Spider-Man Borys, the Spider Rider Canoptek Spyder Doom Weaver Dragonlair Spider Fateweaver Fizik, Etherium Mechanic Gloria, the Great Armorer Hatchery Spider Iron Spider, Stark Upgrade Kavaero, Mind-Bitten Kraza, the Swarm as One Llanowar Greenwidow Makdee and Itla, Skysnarers Radioactive Spider Rizna, the Spider-Crowned Scarlet Spider, Ben Reilly Sensational Spider-Man Shelob, Child of Ungoliant Shelob, Dread Weaver Silk, Web Weaver Silklash Spider Skv'x the Augmenter Spectacular Spider-Man Spider-Ham, Peter Porker Spider-Man 2099 Spider-Man, New Champion Spider-Punk Spider-Woman, Stunning Savior Spinner of Souls Spinneret and Spiderling Sporeweb Weaver Superior Spider-Man Sweet-Gum Recluse Symbiote Spider-Man Tarantusk, Unwisely Awoken Thran Spider Twitching Doll Uharis, the Stormspinner Yera and Oski, Weaver and Guide

Going to 7 loyalty and making 2 1/1's means it's unlikely to die, the 2 CMV return can get you a bunch of useful creatures or fetchlands back, the damage either pings off troublesome creatures or goes face, and the 6 means you get 2 more shots at any of the above
Since then, the card has obviously had quite the fall from grace, with its price plummeting over $10
You can find all the information you need there
And then you have a healthy dose of interesting cards without any of the set mechanics