‘K’ is the final unsent letter of the message
Noon Heist Duets
Node Heist, not us
Node Heist, not us
missing letter is “C”
Last letter of the Message is a C
Node Heist, not us
the last unused letter was A and the message was: “I have a diver down; keep well clear at slow speed.”
Last unused letter was “A”
“A” is the last unused letter
I think it is “X”
maybe “X”
The last unused letter is ‘Z’
“A”là chữ cái cuối cùng chưa được sử dụng.
«X» - это отметка на месте.
The message: ARREST LK ON ARRIVA(L)
The message: ARREST RK ON ARRIVA(L)
Congratulations to @satopin for solving this one after almost a month!
Remember, there are still nine bronze NFTs up for grabs for the next fastest entries, but you’ll need to submit an image representing the final missing letter to me as a private message. Solving this puzzle has also triggered… something… to happen in the next 24hrs which will help with winning the grand prize. (In general this is true of most of the puzzles, even if you haven’t noticed it yet 
)
message: ARREST RK ON ARRIVA(L)
message: ARREST RK ON ARRIVA(L)