Using this as a framework, you can now change cards in your sideboard until you have the appropriate amount of cards for each matchup
It will go in the order of: You, Opponent 1, Partner, Opponent 2, and repeat

Ambush Viper Anaconda Ankle Biter Archers of Qarsi Bamboo Grove Archer Big Boa Constrictor Blight Mamba Boa Constrictor Broodbirth Viper Bushmaster, Coiled Henchman Caustic Bronco Champion of Wits Chishiro, the Shattered Blade Coiled Tinviper Coiling Oracle Coiling Stalker Constrictor Sage Crypt Cobra Death-Hood Cobra Desiccated Naga Devotee of Strength Dread Linnorm Dune Diviner Enduring Tenacity Erebos's Emissary Fanatic of Rhonas Fang of Shigeki Fangkeeper's Familiar Feiyi Snake Fire Snake Floral Evoker Glass Asp Gravebreaker Lamia Guardian Naga Gurmag Drowner Hagra Constrictor Harrier Naga Heir of the Ancient Fang Hexdrinker Honored Hydra Hooded Blightfang Hooded Brawler Hooded Hydra Hope-Ender Coatl Hornet Cobra Ice-Fang Coatl Ikra Shidiqi, the Usurper Imoti, Celebrant of Bounty Jade-Cast Sentinel Jewel-Eyed Cobra Kadena's Silencer Kadena, Slinking Sorcerer Kaseto, Orochi Archmage Kashi-Tribe Elite Kashi-Tribe Reaver Kashi-Tribe Warriors Kheru Spellsnatcher Kirin-Touched Orochi Krosan Constrictor Lasyd Prowler Lonis, Cryptozoologist Lonis, Genetics Expert Lorescale Coatl Lotus Cobra Marsh Boa Marsh Viper Matsu-Tribe Birdstalker Matsu-Tribe Decoy Matsu-Tribe Sniper Mire Boa Mist-Syndicate Naga Mold Adder

Detach 1 material from a monster you control, then add 1 Fish, Sea Serpent, or Aqua monster from your GY to your hand, except "LeVirtue Dragon"
Size is 2 3/8" x 3 1/2" made to hold up to 4 keycards
The first two abilities just arent great in Commander, but the emblem is scary enough that people have to attack this Bant card down anyway