All-Around Vision. The vlazok can't be surprised.
Blood Frenzy. The vlazok has advantage on melee attack rolls against any creature that doesn't have all its hit points.
Magic Resistance. The vlazok has advantage on saving throws against spells and other magical effects.
Spider Climb. The vlazok can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Multiattack. The vlazok makes two Gore attacks.
Gore. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit:23 (4d8 + 5) piercing damage, and if the target is a Large or smaller creature, it has the prone condition.
Stomp. Melee Weapon Attack: +9 to hit, reach 5 ft., one prone creature. Hit:27 (4d10 + 5) bludgeoning damage.
Skeletal, quadrupedal horrors, vlazoks are particularly suited to battlefield cleanup in the Outer Planes. They love to stomp across battlefields after the fiercest fighting is over, trampling survivors and crushing pockets of resistance. When vlazoks anticipate an influx of enemies, these demons jump on them from above to crush them.