Homebrew
Undead Fortitude. If damage reduces the Shadowfell Gnome Ranger 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 gnome drops to 1 hit point instead. Shadow Stealth. While in dim light or darkness, the Shadowfell Gnome Ranger can take the Hide action as a bonus action. Favored Enemy: Humanoids. The Shadowfell Gnome Ranger has advantage on Wisdom (Survival) checks to track humanoids, as well as on Intelligence checks to recall information about them.
Multiattack. The Shadowfell Gnome Ranger makes two attacks with its shortsword or two attacks with its shortbow. Shortsword. Melee Weapon Attack: +5 to hit, reach 1 sq., one target. Hit: 7 ( 1d6+3 ) piercing damage plus 7 ( 2d6 ) necrotic damage. Shortbow. Ranged Weapon Attack: +7 to hit, range 16/64 sq., one target. Hit: 8 ( 1d6+4 ) piercing damage plus 7 ( 2d6 ) necrotic damage. Shadow Arrow (Recharge 1d6>=5 ). The Shadow Gnome Ranger fires an arrow imbued with shadow magic. Ranged Weapon Attack: +7 to hit, range 30 sq., one target. Hit: 17 ( 3d8+4 ) necrotic damage, and the target must succeed on a DC 13 Wisdom saving throw or be frightened until the end of its next turn.