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I guess it's the event for this halloween. Has anyone gotten anything good from this? I've seen some people get transmogrification potions, mutant morphing potions, and mutant petpet paint brushes, but I haven't gotten anything that good as that yet.
Things we know:
1. Every 5 minutes (:00, :05, :10, etc)
2. DOES have a limit
3. Ends October 1
(thanks to everyone who helped)