I forgot that we have the new chapter for our challenge mission.. Thanks to Mak and also Kareem for the infos and complete screenshots.. 

This is the explanation from Kareem about the last chapter..
Hey Ade,
Challenge Mission DublinChapter 3 : Elect me, I'm IrishAs in the previous chapter you will get a loot item upon completing every job, so you are able to get 4x of the mastery item.You will need exactly 491 Pints of Stout and 10847 energy to finish it from A to Z.
It is highly expensive in all of them, but the mastery item will replace your Bald Eagle it is the best defensive animal can be looted.
Yours Kareem

And here are the screenshots..
We have 4 jobs to be done.. Yes, always 4 jobs on each chapter so far on each mission..
Each job mastered will giving you 1x of the mastery item for this chapter! Mastering all 4 jobs will giving you 4x of mastery items!
And here it is, the beautiful mastery item ie Dreacht Capall! According to Mak, it means Draft Horse in English.. You're awesome, Mak!




















