The emergency letter from the MI3 had a special magic seal targeted at Link's Mana. Only Link could open it; if anyone else tried to damage it, the letter would self-destruct.
This letter from the battlefield, Link could only read it by himself. He brought it back to his room and cast a Silent Barrier. Then, he lightly pressed his thumb to the letter, supplying his Mana continuously.
After around three seconds, the shimmering surface on the letter receded like a tide. The entire outer shell faded as well. Finally, the entire letter transformed into a light blue ball of light. It turned into a face that hovered quietly in the air.
The face started mechanically reading the report.