From the snapshot notes:
Wind Burst:
Unique enchantment which can only be found in Ominous Vaults
Has 3 levels
Maces enchanted with Wind Burst will emit a Wind Burst upon hitting an enemy, launching the attacker upward and enabling the linking of smash attacks one after the other
Each level will bounce the attacker higher up in the air
Contrast with the other two enchantments:
Density:
Common Enchantment, accessible in the Enchanting Table and on Enchanted Books in loot
Breach:
Rare Enchantment, accessible in the Enchanting Table and on Enchanted Books in loot
The Enchanting Table actually is able to apply Wind Burst.
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Video:
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It may even announce it in the preview:
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Confirmed!