Amazon offers Twitch Prime members a Legendary Heroes of the Storm Loot Box for free. (You must own Heroes of the Storm to redeem these loot crates. To access them, you'll need to link your existing Twitch account to your Amazon Prime account.) Plus, you'll get another Five Loot Boxes in October and December. Twitch Prime offers in-game loot every month, plus exclusives and surprises. Also, you'll get ad-free viewing and a free channel subscription every 30 days. Finally, enjoy member discounts, pre-order price guarantee, and release-day delivery on pre-release box games on Amazon. Deal ends October 17.