Rank points[]
This required 61 crystals (just over 5 stacks) to trigger for me; the first 54 were traded together, the remainder one at a time. -- Lunaryn 10:01, July 27, 2011 (UTC)
- Same for me, I will change the info.--AkitaNeru 03:57, October 5, 2011 (UTC)
In October 2015 (Back to the Future week) I was able to trade only 6 Ice Crystal to unlock this mission. Not 6 stacks, 6 individual crystals. Dmaps (talk) 16:11, October 18, 2015 (UTC)