11 cards where the set is “thb” and the cards have a custom Showcase frame

Daxos, Blessed by the Sun (Theros Beyond Death #258)
Heliod, Sun-Crowned (Theros Beyond Death #259)
Callaphe, Beloved of the Sea (Theros Beyond Death #260)
Thassa, Deep-Dwelling (Theros Beyond Death #261)
Erebos, Bleak-Hearted (Theros Beyond Death #262)
Tymaret, Chosen from Death (Theros Beyond Death #263)
Anax, Hardened in the Forge (Theros Beyond Death #264)
Purphoros, Bronze-Blooded (Theros Beyond Death #265)
Nylea, Keen-Eyed (Theros Beyond Death #266)
Renata, Called to the Hunt (Theros Beyond Death #267)
Klothys, God of Destiny (Theros Beyond Death #268)

This search is finished. Now the real work can begin.