IMMOBILIZE
The target must succeed at a CON saving throw or be knocked prone and gain the pinned condition. The target can escape the pinned condition by succeeding at an Acrobatics check (DC = 20 + 1-1/2 × the weapon’s item level). The pinned condition ends automatically if the weapon’s wielder either moves or attacks with the weapon again; the penalties from the pinned condition still apply to the target if the wielder uses the weapon to attack the pinned target.
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