STEPS
:) First, you need 000. The easiest way to obtain him is by going on GC, choose “Gacha” and pick “Dark Gacha” and keep buying Gacha Pulls until you get a unit named “000”. Second, go to “Units” and tap on a unit and swap them with 000 or go to 000’s profile and click “Enhance”. Click the eye button and wait a few minutes, eyes should appear. Tap them and you’re done! Battle the level 666 boss. (:

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