+1 to Saves against Wands, Staves, Rods and Spells for every 3.5 points in Constitution (rounded down)
20% of Magic item failure when using magical items that are not illusionist items, armor, weapons, shields, gauntlets and girdles, or items that mimic thief abilities
+1 to hit kobolds and goblins in melee
Gnolls, bugbears, ogres, trolls, ogre magi, giants and titans get -4 to attack rolls when attacking a dwarf
Infravision up to 60 feet
5-6 chance to detect grade or slope in passage when within 10 feet
7-10 chance to detect unsafe walls, ceilings and floors when within 10 feet
4-6 chance to determine approximate depth underground
3-6 chance to determine approximate direction underground