What are Heroic Chests?

Heroic Chests are the best and fastest source of Hero Coins (also providing Common, Rare, and Epic Cards) and can be purchased in bundles using Gems. Once a bundle is purchased, a player will have one chest ready to be opened each day they log in, up to the amount they bought, and it doesn't matter if they log in on consecutive days or not. The amount you purchase, is the amount you get, but it's a max of one per day.