Congratulations ! You've got the holy paladin by adopting your pets ! So lucky !
Holy paladins are able to explore two times during the same day ! Most of the time, they come with a line which is usually used for limited creatures, and they are often the last reward for events, the reward the most expensive, for which you need to unlock all event creatures before. Each year, you can also get one by adopting, and an other by exploring !