pf2e.fyi
From Pathfinder Book of the Dead, which isn't enabled.

Storm Shroud

FEAT 8
Activity 2 actions
Archetype Mummy
Prerequisites Mummy Dedication

Frequency once per hour

You become surrounded by a swirling storm of rain, sand, snow, or clouds, whichever of those suits your bound terrain. This activity has traits appropriate to the storm you create-typically earth for sand and water for rain, snow, or clouds. You become Concealed for 1 minute. You can't use this concealment to Hide or Sneak, as normal for concealment that makes your position obvious.

Pathfinder Book of the DeadOGL