Any two-mana Counterspell that doesnt leave you down a card is at least worth considering

Acid Web Spider Alenni, Brood Recruiter Alessos and Pras, Acrobats Amazing Spider-Man Ancient Spider Aquastrand Spider Arachnus Spinner Arasta of the Endless Web Arasta of the Endless Web Archweaver Blightwidow Borys, the Spider Rider Brood Weaver Broodspinner Cactarantula Canopy Spider Chainweb Aracnir Chizak, Apex Arachnosaur Copper Longlegs Cosmic Spider-Man Cren of the Spider Brood Deadly Recluse Diligent Webkeepers Dragonlair Spider Ember Weaver Ettercap Ezekiel Sims, Spider-Totem Fateweaver Frostweb Spider Funnel-Web Recluse Giant Spider Giant Trap Door Spider Glint Weaver Gloomwidow Glowstone Recluse Gnottvold Recluse Goliath Spider Grappler Spider Graverobber Spider Hatchery Spider Hitchclaw Recluse Hoarding Recluse Ishkanah, Grafwidow Janai and Hoppy, Roofskippers Jungle Weaver Juvenile Gloomwidow Kessig Recluse Leyline Weaver Llanowar Greenwidow Mammoth Spider Mineshaft Spider Mirkwood Spider Netcaster Spider Nyx Weaver Obelisk Spider Oran-Rief Recluse Orris, Last of the Web Lords Pale Recluse Penumbra Spider Pincer Spider Plated Spider Radioactive Spider Rib Cage Spider Root Spider Rotwidow Pack Ruins Recluse Scarlet Spider, Ben Reilly Scions of the Ur-Spider Sentinel Spider Shelob, Child of Ungoliant Silk, Web Weaver Silklash Spider

Unlike previous tournaments, everyone who competed received this card
If Eldrazi arent your thing, you dont need to use them but Jhoira is generally a big mana commander that uses time rather than mana ramp, as you might see in a green deck, to cheat out spells
Milling refers to putting cards from the deck into the graveyard, so theyre not discarded and dont trigger madness