Admiral angry at letter of provocation from pirates

In connection with today\'s theme, \"Letter,\" I wrote a fantasy novel about marine adventures set in a world reminiscent of the Age of Exploration. “El Pirata Del Grimorio ~Pirate of the Grimoire~” (*Refer to the URL below) I thought I\'d make an illustration for it, so I created it. A scene following the illustration I uploaded earlier, \"The sailor on watch hits the letter bird.\" The admiral of the convoy reads a letter from a pirate who has been turned into a paper bird using magic, and is furious at its provocative content. I really want him to hold the letter with both hands and tremble with anger, but I\'m having trouble generating it properly... Although it was a little too thick, this is a reasonably well made piece.