Dust titan

Dust titans are elemental creatures who inhabit the plane of Pandemonium. The titans are able to switch their form between the solid sandstone and whirlwind cyclone form.

Appearance
Dust titans are massive elemental creature made out of the sand and rock elements of Pandemonium itself brought into a physical form. Their step size extends to a 20 to 25 foot. In their whirling form, dust titans shift into a tornado of dust and sand that once formed their physical body. Their only constant feature is their burning bright green eyes that move across their body.

Abilities
In their whirlwind form dust titans are resistant to bludgeoning, piercing, and slashing damage; immune to being grappled, and have +10 Constitution saving throw. In their sandstorm form the titans have 26 AC.


 * Dust titan has three legendary actions per round. It could use those legendary actions to make an attack (costing one legendary action) or switch between its sandstone and whirlwind forms (costing two legendary actions).
 * Whirlwind: While in the whirlwind form, each creature in the dust titan's space are blasted by numerous dust particals and must make a DC between ≥17 and ≤20 Dexterity saving throw. On a failure, a target takes non-magical piercing damage or half as damage on a successful roll and is engulfed in the cyclon. At the start of its turn, every creature that is grappled by the titan takes piercing damage from being battered around. A creature can attempt to pull a creature out of the whirlwind. Doing so requires a successful contestant roll against the titan's Strength.
 * A creature that hits the whirlwind with a melee attack takes piercing damage.

Actions

 * Mulitattack: While in the whirlwind form, the dust titan can make two slam attacks and attemt to crush one target withing its form.
 * Slam: An attack with +17 attack modifier against one creature, dealing non-magical piercing damage. If hit, the target must make a Strength saving throw (DC ≥19) or be grappled by the titan. Each round. the creature can repeat the Strength saving throw to attempt to break the grapple.
 * Crush: The titan attempts to crush one of the engulft creatures with an attack.

Known dust titans
A dust titan destroyed the the citadel near the Howler's Crag of Pandemonium. After Vox Machina defeated the Forgotten Empyrean and began making their way to the ruins of the citadel in search of Bob, the same dust titan started to follow the party, catching up with them at the citadel.