Mort Duke, The Younger One, and Rolph Duke, The Older One are twin Unique Vault Sentries found in The Vault in Diablo III. They always spawn together, and although they count as separate entities for killing purposes, they both attack as one when alerted. In combat, they both have the Fast affix and triple attack speed, being very similar to Dread Stalkers. Mort also has Desecrator affix, and Rolph has Arcane Enchanted.