Flesh Tsunami

You melt one of your thralls into a massive wave of sticky flesh. Destroy the target thrall to create an area of greater difficult terrain in a 60-foot cone originating from the thrall's former space. You can destroy a second thrall in the cone to make its limbs grasp your foes. If you do, each enemy in the area must succeed at a Fortitude saving throw or be Immobilized for 1 round or until it Escapes; the Escape DC is your spell DC.