Dragon Box can be cleared by making matches next to it or hitting it with power-ups 4 times. When it is hit for the 4th time, it disappears from the board and generates 2 egg boxes.

Egg Box can be cleared by making matches next to it or hitting it with power-ups 2 times. It will spread eggs when cleared.

Egg can be cleared by making matches next to it or hitting it with power-ups 2 times. 

Once an egg is cleared, the Dragon will be released. After all the dragons are released, the target for this item will be completed.