Freedom of Movement Size:2XL You adapt your body to

You adapt your body to an aquatic environment

or eight connected 5-foot cubes)

you can make the attack again on each of your turns as an action

these tentacles turn the ground in the area into difficult terrain

Freedom of Movement Size:2XL You adapt your body toYou touch a willing creature. For the duration, the target's movement is unaffected by difficult terrain, and spells and other magical effects can neither reduce the target's speed nor cause the target to be paralyzed or restrained. The target can also spend 5 feet of movement to automatically escape from nonmagical restraints, such as manacles or a creature that has it grappled. Finally, being underwater imposes no penalties on the target's movement