yugioh unaffected by card effects

yugioh unaffected by card effects So my opponent has this on the field and it says it is other cards effect, is it gg? I cant banish/ destroy it with cards effect nor i have Unaffected by card effects and

Name: yugioh unaffected by card effects So my opponent has this on the field and it says it is other cards effect, is it gg? I cant banish/ destroy it with cards effect nor i have Unaffected by card effects and
Brand: standardengineering.in
SKU: 32072072400
Price: 28.90 USD
Availability: InStock
Rating: 4.4239 (24 reviews)

SKU: 32072072400

4.4

USD28.90 USD75.90

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Description

A cards effect on the other hand, doesnt explain why the card is in a deck

Once Brotherhood Spy's ability has resolved, removing the legendary Assassin (or Assassins) you control from the battlefield or causing them to lose the legendary supertype or Assassin subtype won't cause Brotherhood Spy's ability to stop applying for that turn