On the destroyer level you can use elements to break the crystalls stand (don't fly) away from the crystalls (not to far) and use spyro's ice bullets on the crystalls and...well... Do that and you will be a happy gamer.
Here's a hint on how to beat 100/100 of the game: ~Elite enemies~
-The Catacombs- After Golem loses his hand, the enemy is at the bottom of the arena. -Twilight Falls- Follow a gust of wind that you find through a cave where you push the tree over. -Valley of Avalar- On top of a cliff directly over from the village. -Ruins of Warfang- Return to where you got the crystal key in the bottom left and bottom right after working the statue. -The Dam- Above a large doorway blocked with earth. -Burned Lands- In a cave at the top of a half-bridge near the start of the first lava river. -Floating Islands- 1. After lighting all of the 8 torches, it appears near the largest section of stonework. 2. On a triangular platform off to the right after the 2 doors.