Arasta of the Endless Web

Mana cost: {2}{G}{G}
Type: Legendary Enchantment Creature — Spider
Power / toughness: 3 / 5
Set: Theros Beyond Death Promos #165p (rare)
Price: $0.73 USD

Reach
Whenever an opponent casts an instant or sorcery spell, create a 1/2 green Spider creature token with reach.

Arasta of the Endless Web has 16 printings, first in Theros Beyond Death (2020). EDHREC ranks it #1,024 among Commander cards. It appears most in Shelob, Child of Ungoliant decks (13,136 on EDHREC). 7 public decks on TCG run it. It has 1 official ruling.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: not legal
brawl: legal

Public decks that run Arasta of the Endless Web

Abzan Armor - Tarkir: Dragonstorm Commander, led by Felothar the Steadfast
Cabaretti Cacophony - New Capenna Commander, led by Kitt Kanto, Mayhem Diva
Enduring Enchantments - Commander Masters, led by Anikthea, Hand of Erebos
Exit from Exile - Commander Legends: Battle for Baldur's Gate, led by Faldorn, Dread Wolf Herald
Hatsune Miku - Secret Lair Commander, led by Trostani, Selesnya's Voice
Squirreled Away - Bloomburrow Commander, led by Hazel of the Rootbloom
Tramplesaurus Rex - Foundations Commander, led by Ghalta, Primal Hunger

Commanders that run Arasta of the Endless Web most

Deck counts from EDHREC.

Shelob, Child of Ungoliant: 13,136 decks
Blech, Loafing Pest: 9,338 decks
Cosmic Spider-Man: 8,601 decks
Baylen, the Haymaker: 7,133 decks
Felothar the Steadfast: 6,161 decks
Chatterfang, Squirrel General: 5,971 decks
Witherbloom, the Balancer: 5,733 decks
Hazel of the Rootbloom: 4,598 decks

Often played with Arasta of the Endless Web

Cards that show up in the same decks on EDHREC.

Rulings

2020-01-24: An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.