Ether chest is a little surprise box. It can contain everything this game has to offer. From potions to loot and dungeon gear.
Opening an Ether Chest costs ETHCrystal1
You have ETHCrystal0 available
There is a 100% chance to get some gems, 75% chance to get a potion (health, energy, hunter), 50% chance for special adventure requirements (lamp, rope, pickaxe), 40% chance to receive unique loot and 5% chance to get some ETHShards or even your entire ETHCrystal back and 1% for a legendary fragment.
But BE WARNED! Only a fool will spend more than they can afford. Don't be a fool.