Kog'Maw's got a Caustic Spittlebug.

I was just in a game, and apparently his Q will occasionally apply the visual of Caitlyn's ult(As she's locking on). It will wear off after the debuff is over, but it still is a visual bug. Perhaps a particle of greenish bubbles would work? I was not able to get a screenshot, but it happened more than once, so I'm sure it's repeatable.
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