This card is available to purchase on eBay undgraed and graded
If he moves his deck leader to one of the corners, send a strong monster to the side around the labyrinth squares while sending another strong monster around the other side so that you can trap him in one area of the field and hack down his LP.
On top of that, Aurora, Dreaming Guardians three strength and five willpower pair with its two lore to make it a solid card by itself, able to likely withstand a few attacks in the early game - especially given that having Shift 3, allowing you to bring it out on top of another Aurora card for a lower ink cost, means you can have it on the field very early on
Symbiotic Swarm Deck List Commander (1) 1 Kathril, Aspect Warper Planeswalkers (1) 1 Ajani Unyielding Creatures (34) 1 Tayam, Luminous Enigma 1 Nikara, Lair Scavenger 1 Yannik, Scavenging Sentinel 1 Avenging Huntbonder 1 Cartographers Hawk 1 Vitality Hunter 1 Daring Fiendbonder 1 Slippery Bogbonder 1 Void Beckoner 1 Titanoth Rex 1 Akroma, Angel of Wrath 1 Angel of Finality 1 Cataclysmic Gearhulk 1 Kalemnes Captain 1 Odric, Lunarch Marshal 1 Reveillark 1 Solemn Recruit 1 Sunblast Angel 1 Zetalpa, Primal Dawn 1 Cairn Wanderer 1 Soul of Innistrad 1 Soulflayer 1 Hornet Queen 1 Majestic Myriarch 1 Splinterfright 1 Archon of Valors Reach 1 Karametra, God of Harvests 1 Aerial Responder 1 Vampire Nighthawk 1 Acidic Slime 1 Sakura-Tribe Elder 1 Satyr Wayfinder 1 Skullwinder 1 Nyx Weaver Spells (13) 1 Blood Curdle 1 Unbreakable Bond 1 Obscuring Haze 1 Selective Adaptation 1 Ever After 1 Duneblast 1 Unburial Rites 1 3Deathsprout 1 Despark 1 Grisly Salvage Artifacts (7) 1 Bonders Ornament 1 Netherborn Altar 1 Mimic Vat 1 Arcane Signet 1 Commanders Sphere 1 Sol Ring 1 Swiftfoot Boots Enchantments (6) 1 Martial Impetus 1 Parasitic Impetus 1 Predatory Impetus 1 Together Forever 1 Abzan Ascendancy 1 Deadbridge Chant Lands (38) 1 Nesting Grounds 1 Canopy Vista 1 Caves of Koilos 1 Exotic Orchard 1 Gavony Township 1 Grim Backwoods 1 Sungrass Prairie 1 Blighted Woodland 1 Command Tower 1 Golgari Rot Farm 1 Krosan Verge 1 Memorial to Folly 1 Myriad Landscape 1 Orzhov Basilica 1 Sandsteppe Citadel 1 Selesnya Sanctuary 1 Blossoming Sands 1 Evolving Wilds 1 Jungle Hollow 1 Scoured Barrens 7 Plains 7 Swamp 4 Forest
The first match I lost 2-1 as we had very similar decks but they had slightly better consistency cards
