Getting the effect off can be a bit tricky and requires the user to play around with any negates their opponent has on their field
Japanese cards have a more niche (but growing) demand outside Japan
On the other hand, the power level of this card is highly compromised as a Sorcery, as of course Instants give you the option of dodging removal
ST8-07 U Digimon Lv.5 Wingdramon Color Blue Cost 7 DP 7000 Digivolve Cost 1 Blue 3 from Lv.4 Form Ultimate Attribute Vaccine Type Sky Dragon Card Text 1 [Effect] Blocker (When an opponent's Digimon attacks, you may suspend this Digimon to force the opponent to attack it instead.) ST8-08 R Digimon Lv.5 AeroVeedramon Color Blue Cost 7 DP 7000 Digivolve Cost 1 Blue 3 from Lv.4 Form Ultimate Attribute Vaccine Type Holy Dragon Card Text 1 [Effect] Jamming (This Digimon can't be deleted in battles against Security Digimon.) Card Text 2 [Inherited Effect] [Your Turn] While you have 8 or more cards in your hand, this Digimon gains Security Attack +1

In addition, most of the spells in this set that trigger them tend to be great, including winners like: Thunder Magic Ice Magic Dreams of Laguna (triggers with flashback) Retrieve the Esper Eject Sorceress's Schemes Choco-Comet UR gets to play a ton of good interaction and card advantage, all of which can set up cascading advantages with its value creatures