Here is the final quest currently given by the Miscrit Collector. After completing this quest you will start over at the beginning. This information will be added to the full Miscrit Collector guide found here: http://miscrit.blogspot.com/2011/05/miscrit-collector.html
40. Collect 1 Blazebit. Rewards 2 Blazebits.
The final quest given by the Miscrit Collector is to bring her the most powerful Miscrit currently available in the game. Blazebit is found in the Elder Tree and the two surrounding bushes. It is a rare Miscrit, and it may take several trips to find. Occasionally, Blazebit is also available in the Gem Shop.
I will continue to post other helpful Miscrits: World of Adventure information. Please check back often for more updates on the game, and subscribe to the blog if you like it!