In the Dragon's Nest

This card enter the battlefield with one mission counter
on it. When there is no counter on the quest, sacrifice it.
When a Dragon enter the battlefield, remove one mission counter from In the dragon's nest.
When you sacrifice In the dragon's nest, you may
look a the top five card of your library. You may
choose one Dragon card among them and put it in
your hand. Put the rest at the bottom of your
library in any order.