The Personal Letter to the Kingdom of Nibana (ニバーナ王国への親書所持) is an item from Alex Kidd in Miracle World. It can be found inside the Radaxian Castle, but only after rescuing Egle, who informs Alex Kidd about its existence. It won't appear if Egle isn't rescued. This autographed letter addressed to the Kingdom of Nibana is required for Alex to obtain the Hirotta Stone from king High Stone in his castle.