Blues Eyes White Dragon Kaibas most iconic monster, the Blues Eyes White Dragon is certainly a forced to be reckoned with inside of the show
Vein Ripper When you stare across the board at a ward cost like the Vein Rippers it makes you tear your hair out
The second factor is that Urshifu has very polarized matchups, with great matchups against some popular decks (Gardevoir, Miraidon, Charizard) and very bad matchups against others (Mew, Snorlax, Roaring Moon)
Green decks that lean into counters often struggle to close games efficiently
Discarding your entire hand also means that you will inevitably have to discard cards that you don't necessarily want to discard as opposed to other cards which simply let you pick and choose
With this deck you use the Tamers to support playing Digimon and attack mainly with powerful level 5 Digimon