Remember that your commander will make you a ton of troops, so keep some back in hand so you're not out of the game to one spell
Otherwise, this creature loses all keyword abilities
You can sacrifice it to cheat an enchantment into play, and there are lots of interesting targets

Battle your way through the plane of Ikoria with monster-themed mechanics that grow your creatures build your bond and crush your opponents Symbiotic Swarm Commander (1) Planeswalker (1) Creatures (34) Cartographer's Hawk Sakura-Tribe Elder Satyr Wayfinder Aerial Responder Nikara, Lair Scavenger Nyx Weaver Skullwinder Solemn Recruit Splinterfright Vampire Nighthawk Angel of Finality Daring Fiendbonder Odric, Lunarch Marshal Slippery Bogbonder Tayam, Luminous Enigma Vitality Hunter Yannik, Scavenging Sentinel Acidic Slime Avenging Huntbonder Cairn Wanderer Cataclysmic Gearhulk Kalemne's Captain Karametra, God of Harvests Majestic Myriarch Reveillark Archon of Valor's Reach Soul of Innistrad Soulflayer Sunblast Angel Hornet Queen Akroma, Angel of Wrath Void Beckoner Zetalpa, Primal Dawn Titanoth Rex Instants (6) Abzan Charm Blood Curdle Deathsprout Despark Grisly Salvage Obscuring Haze Sorceries (7) Cultivate Harmonize Unbreakable Bond Unburial Rites Ever After Selective Adaptation Duneblast Enchantments (6) Together Forever Abzan Ascendancy Martial Impetus Parasitic Impetus Predatory Impetus Deadbridge Chant Artifacts (7) Sol Ring Arcane Signet Netherborn Altar Swiftfoot Boots Bonder's Ornament Commander's Sphere Mimic Vat Lands (38) Blighted Woodland Blossoming Sands Canopy Vista Caves of Koilos Command Tower Evolving Wilds Exotic Orchard Gavony Township Golgari Rot Farm Grim Backwoods Jungle Hollow Krosan Verge Memorial to Folly Myriad Landscape Nesting Grounds Orzhov Basilica Sandsteppe Citadel Scoured Barrens Selesnya Sanctuary Sungrass Prairie Forest x4 Plains x7 Swamp x7 Commander, Theme, and Strategy Kathril uses a feature introduced in Ikoria : placing keyword counters on creatures

Our commander must cost two mana or less (and have WB in their color identity), which immediately narrows down our options
There are easy ways to blink creatures and retrigger the first three chapters over and over again