Living Sandstorm

[Dalhyp]

In the Mummy's Mask Adventure, "The Slave Trenches of Hakotep" there is a monster called Living Sandstorm. The monster is a shape changer. What would be the code needed to handle the monster's shape changing ability. I figured it would be something like when shape change is checked, reduce strength, remove the slam attack and add swarm damage and special abilities.

Thanks!