The Booster Box Eta Diamond contains 12 Eta Diamond Packs. That's a huge chance to get some nice extras into season 11.

Probabilities of Eta Diamond Packs: Rare: 37.5%, Epic: 37.5%, Legendary: 15%, Mythic: 10%

The Booster Box Eta Diamond has a mining power of 6500 in season 11.
This might include an Elephant Wombatium that will give you 2500 Mining Power.