Our St Patrick's Day Event has just started

When you complete an Leprechaun quest between now and March 31st, you will win one of these new prizes. When you receive a prize from him, he will tell you how many minutes you should wait before you will win another bonus prize from completing a quest.
The Leprechaun has been added to the Site Reminders to let you know when you will receive a prize again.

Can you find this new Hidden Avatar?