The new Delve feature introduced in The War Within has been very positively received by players, in part thanks to the sheer amount of gearing you can get done with this new system. In addition to two chests at the end of normal Delves (containing basic gear), there are Bountiful Delves which have an unlockable chest with higher iLvl loot than normal but there's an even better chest you can unlock by using Delver's Bounty Maps.