As of GooP 1.6.2, Ground Pound Stat has been merged into that and will not be updated again individually. It is there compatible with MMOItems versions since 4.8

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Adds a single Item Stat to MMOItems:
Ground Pound Stat

Specify a MythicSkill to run when the item hits the ground after being dropped.
° @Self is the player who dropped the item.
° @TriGGer is the item entity.
° @Origin is the place where the item landed.

Only works when a player drops the item

Dependencies: MMOItems (premium), MythicMobs (4.9+)