http://dragonnest.nexon.net/news/event/00IoE/


Quote Originally Posted by Nexon


Saturday, December 12 to Saturday, December 19

Finals season is here and all of Altera’s students are working hard to be top of the class. You should apply that same level of preparation to your dungeon runs! Whenever you complete a dungeon, you receive a rank: SSS, SS, S, A, B, C, or D. Can you apply yourself and get a straight “A” rank?

Complete the following Level 90 Abyss dungeons during the event period and earn an “A” rank on all five. No less, no more—you need to earn exactly an “A” rank!

- Badlands
- Lonely Cradle
- Gold Dust Gulch
- Zephyra Plains
- Triyan's Domain

For each “A” you earn, you will be rewarded with five R-coins (a total of 25 R-coins per character).

-Times-
Pacific: 12:00 AM Saturday December 12, 2015 – 11:59 PM Saturday December 19, 2015
Eastern: 3:00 AM Saturday December 12, 2015 – 2:59 AM Sunday December 20, 2015

Note: This event can be completed by up to three characters per account, for a total of 75 R-coins earned per account.
Note: R-coins will be distributed to the character’s special storage after the event ends.