Finderme Bingo event from 26 Jan. - 2 Feb. 2017:

Successfully complete the above challenges - ranging from crafting objects, defeating specific enemies and earning Area Points (AP) - in order to obtain prizes. Completing the challenges to obtain a bingo line will earn you rewards. Completing all bingo lines will net you 10,000 Blood Orbs.

Bingo lines cannot be repeated and the challenges can only be completed once.

Full list of rewards can be found here.

You will receive a notification in the chat window and in the upper right of your screen when you have successfully completed a challenge and/or bingo line, followed by an in-game mail of the reward.