If this card attacks, your opponent cannot activate Spell/Trap Cards until the end of the Damage Step
Counterspell is a rather underrated card in the modern metagame, as it can easily unfold its potential in a deck like Miracles that is perfectly equipped to enter the late game, where this card can deal with anything that requires that much attention
The user can banish Soul Servant from the graveyard in order to draw cards equal to the number of Dark Magician , Dark Magician Girl , or any Palladium monsters in the graveyard with different names
If you can use it together with Skatewing Spy, then it will also gain flying, which will become a big problem for your opponent
If youre curious about the stories behind cards like the Illustrator Pikachu or the Blastoise Presentation Galaxy Holo, its a great read
[Security] effects on Security Digimon are treated as Digimon effects, so the "this Digimon isn't affected by the effects of your opponent's Digimon" effect prevents such effects from affecting this Digimon