Talk:Thin Ice/@comment-122.176.246.126-20110625142445

mastery is between 10-1 % when getting the 1st car, by the time you are trying to get the 2nd car the mastery goes down to 1-5% only. From 3rd car onwards, it is only 1%.

The best option would be to manage and get one car and forget about the event untill or unless you got tens of thousands of energy. I just got barely 9000 and I found this event a major pain!