Attention Maplers, An issue is occurring with the Tengu boss battle that makes it impossible to complete, due to the Purple Aura not appearing during the fight. Unfortunately, this issue, which was introduced with the v.233 update, cannot be resolved without a full patch. As a result, we will be unable to fix this issue until the v.234 update, currently scheduled to come on July 20, 2022. We apologize for the inconvenience, and encourage you to avoid this piece of content until the v.234 update arrives. Thank you, - The MapleStory Team View on the Official Site