Kakao is having a new event including the new General’s Accessories and their enhancement running from Jan 10 to Jan 31.
You will need to be between Level 53 and 61 to start the event. It is available once per family. The PEN version of these accessories can be seen below. They only have 1 AP but have +12 AP against monsters so they are pretty much AP 12 in PvE.
Talk to your Black Spirit and select the quest Growing Thirst from him. Pick wisely as you can only get one of the General accessories.
Then complete rest of the quests from your Black Spirit.
You will enhance your General Accessories with Fierce Fighting Spirit Stones and it is always a 100% success rate if using Force-Enhance.