For Swords & Wizardry:
Blitzkringler
Hit Dice: 4
Armor Class: 4 [15] (8 [11] unarmored)
Attacks: Two-handed sword (1d10 plus 1 point of lightning damage)
Saving Throw: 13
Special: Immune to cold & lightning
Move: 12
Alignment: Lawful
Challenge Level/XP: 5/240
Blitzkringlers are a mysterious race of lawful warriors who inhabit arctic regions. When dealing with those who are nice, blitzkringlers act benevolently. Against those who are naughty, blitzkringlers can be terrible. The red-and-white suits of fur and leather worn by blitzkringlers are equal to chain armor. Blitzkringlers prefer to fight with two-handed swords. Any metal weapon wielded by a blitzkringler inflicts an extra point of lightning damage with a successful hit.
(Pic at this link.)