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Date & Time: Since Launch of Blue Mage
Frequency: Everytime
World name: Adamantoise
Character name: Kiskili Tsuki
Class/Level: Blue Mage/Any Level
Area and coordinates: All
Steps:
1. Become afflicted by a Cleanable Debuff (Poison, Paralysis, Silence, Blind)
2. Use Related cleansing item (Antidote, Spine Drops, Echo Drops, Eye Drops)
3. No Effect.
4. Repeat with any other class or job. Works just fine.