Great interview with Bungie’s director of production Jonty Barnes and lead concept artist Jesse van Dijk.
http://destinynews.net/bungie-raids-changes/
English
#Destiny
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A couple of things to consider and remember: 1. Each level after 20 will grant you one Mote Of Light. 2. There's no telling how many MOLs you will need to purchase just a helmet. Lets say a helmet that has the light stat cost 2 MOLs, chest at another 3 or 4 MOLs, gauntlet at another 3 MOLs, etc. This alone could push the level cap past 30 when you think about it.