Panel 1:
* Setting: A dense jungle, sunlight filtering through the leaves.
* Characters: Don Juan, looking determined but weary.
* Dialogue: "I must find the Adarna before nightfall. The King's life depends on it."
Panel 2:
* Setting: Close-up on a swirling mist, obscuring the path ahead.
* Characters: Don Juan, his eyes squinting against the mist.
* Dialogue: "What is that strange sound?"
Panel 3:
* Setting: A clearing in the jungle. A monstrous seven-headed serpent coiled on the ground, its eyes glowing red.
* Characters: Don Juan, drawing his sword, fear etched on his face.
* Dialogue: "This must be the Serpent of the Seven Heads!"
Panel 4:
* Setting: A close-up of the Serpent's head, its mouth open in a fearsome roar.
* Characters: Don Juan, dodging a burst of fire from the serpent's mouth.
* Dialogue: "I won't be defeated! I have to reach the Adarna!"
Panel 5:
* Setting: The jungle, Don Juan standing victorious over the serpent's lifeless body.
* Characters: Don Juan, breathing heavily, his sword still drawn.
* Dialogue: "The serpent is dead! But the journey is far from over."
Panel 6:
* Setting: A lush meadow with a towering tree in the center. A magnificent bird with golden feathers sits perched on a branch, singing a beautiful song.
* Characters: Don Juan, eyes wide with wonder, listening to the Adarna.
* Dialogue: "Could this be the legendary Ibong Adarna?"
Panel 7:
* Setting: A close-up on the Adarna, singing sweetly.
* Characters: Don Juan, smiling, reaching out to the bird.
* Dialogue: "My journey has been long and arduous, but I have finally found you."
End.
Note: This is just a brief outline of Chapter 4. The comic strip could be expanded with more panels and details, adding more action and emotion to the story. You could also include more characters, like Don Juan's brothers, or introduce new obstacles and challenges to overcome. The possibilities are endless!