User blog comment:Visually/Don't do "Summer's Over Update" before claim your mastery rewards./@comment-109.80.17.101-20151014125318/@comment-26536836-20151014170237

I am trying to pro the lykan but it required too many mid-tech and engine cards so I am still waiting for the engine card.

If you are hard to pro Lykan, you can do other cars like Veneno which is quite easy to pro it and challenge 15 will give 5.8k to 6k credits and can finish 57 to 54 second.