Forgery help?

Im trying to get a key to the corrupted sand swept tomb dungeon and i have the runes, but i need the corrupted sand swept tomb dungeon key fragments. How do i get these?

 

You can find mobs on the map that drop them or getting them from raids

 

what mobs and what raids

 

theres some mobs at the canyon around thesead that drop them and I got some keys from notg and nol too

 

what r notg and not and also what mobs?​

 

NotG is the Nest of the Grootslangs raid, NoL is the Nexus of Light raid, the mobs that drop the broken SST keys are the corrupted Sand Swept Tomb key guardians, and also some world events at level give them.

 

Ok Thank you so much!