Homebrew
Delayed Rot. The draug has advantage on all saving throws made to resist accelerated time passage or aging.
Undead Fortitude. If damage reduces the draug to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the draug drops to 1 hit point instead.
Gouge. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d6+2) piercing damage
Most draugs are found either alone or in pairs in crypts and other burial sites. Oftentimes they were respected figures in life, so their graves usually contain all manner of trinkets and even sacrificed animals as grave goods. However, by the time any adventurers encounter them, the flesh of any animal offerings would probably be long since consumed by the ravenous draug.
Deathly Presence. The area that a draug resides in is subject to an aura of fatigue and madness. The moment a creature enters a space within half a mile of the draug, it must make a DC 10 Constitution saving throw. This saving throw is repeated every hour until the creature leaves the area or the draug is destroyed. On a failure, a creature takes a level of exhaustion. Each time a creature fails this saving throw by 5 or more, it takes 3 (1d4) necrotic damage. The second time a creature fails this saving throw by 5 or more, it is subjected to a random effect listed on the Long-Term Madness table (see page 258 of the DMG) until the draug is destroyed. This effect does not compound in the presence of multiple draugs.
burial mounds, crypts