No comment 
.
Anyways, time to backread a bit since I missed some replies while typing.
Has pandoras box been mentioned anywhere lorewise in AO?
or advanced immortality
How are you going to bribe the person who you want to get money from?
is it the myriad
the treasure is obviously at mango isle since no one remembers that island
noope
yes
already checked
its gotta be thrylos crossing
is there an island no one guessed at this point
mango isle?
many but less likely to be them
I dont feel like the answer is an island… Its definetly an object on an island
its obviously elm island 
possibly
guys remember, its the treasure, not where the treasure is
We can list every island from AA and AO and im sure we wouldnt get it!
lets call it munera garden’s winterveil flag and call it a day