9 cards where the card is tagged “tribal-serpent”

Kenessos, Priest of Thassa (Jumpstart 2022 #13)
Kiora, Sovereign of the Deep (March of the Machine: The Aftermath #35)
Koma, Cosmos Serpent (Murders at Karlov Manor Commander #213)
Quest for Ula's Temple (Worldwake #35)
Runo Stromkirk // Krothuss, Lord of the Deep (Innistrad: Crimson Vow #246)
Runo Stromkirk // Krothuss, Lord of the Deep (Innistrad: Crimson Vow #246)
Serpent of Yawning Depths (Theros Beyond Death #291)
Slinn Voda, the Rising Deep (Commander Legends #405)
Spawning Kraken (Commander 2021 #33)
Whelming Wave (Commander Legends #409)

The message was clear to Sorin—time to search for something else.