Runescape Katanas

[PinSellerPin123]

I need help:
for the runescape katana does the 90 day card have to be bought only at gamestop? or does any 90 day card work like if i were to buy it from a 7 eleven store would it work?

Thanks

 

[Downfall V2]

Only gamestop.

 

[PinSellerPin123]

Thanks!

 

Answered.