If you thought Diablo 4 was tough enough, it looks like Blizzard has even more challenging content in store for players. A recent datamine has revealed the existence of Diablo 4 World Tier 5, with new gem rarities to help players gear up for the more difficult content planned ahead.

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The datamine, which was posted by DataMineARPG, showcases official artwork for the World Tier 5 banner as well as the higher-level gem rarities. Here’s a look at both:

According to the DataMineARPG, World Tier 5 will likely be unlocked via the Capstone Dungeon in Fractured Peaks, though not much is known about the new tier other than that. As for the gems, rarity levels 6, 7, and 8 have been discovered. While Level 6 doesn’t have a concrete name just yet, Level 7 is named “Magnificent” whereas Level 8 is named “Perfect.” It’s worth mentioning that Perfect gems are in Diablo 2 as well, with Perfect being the highest possible rarity for gems. Based on the values of stats in current gem rarity levels, DataMineARPG also compiled estimated values for Levels 6, 7, and 8. You can find all the numbers in the dataminer’s Ko-fi post here.

As World Tier 5 and the new gem rarity levels are still works-in-progress, it’s unlikely that we’ll hear anything official anytime soon. That said, Blizzard did confirm that there are two expansions for the game brewing; perhaps this new World Tier will see the light of day once the first expansion is released.

Same as with any datamine, treat this one with a grain of salt until confirmed or denied by Blizzard.