Here is our Space Eagle Total Destruction video walkthrough for Angry Birds Space Cosmic Crystals level 7-13. Send the Sardine Can south of the main planet, calling for the Space Eagle just next to the two asteroids there. As needed, use either another Sardine Can or a normal bird to target the remaining pigs to the north.
If you have an alternate strategy please feel free to leave a detailed comment below.
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1. Red Bird into lower right rocks to destroy the lower right crystal planet and pigs.
2. Launch the Sardine Can over the lower tnt box and activate it when it reaches the atmosphere in the middle of the two tnt boxes.