Armor Class: 14 (or wears armor)
Hit Dice: 2
No. of Attacks: 1 touch
Damage: 3d10
Movement: 60′
No. Appearing: 6d4, Lair 8d12
Save As: Fighter: 2
Morale: 12
Treasure Type: D
XP: 100

Brown Greepers, otherwise known as Grak’s Progeny, are a peculiar type of undead invented by legendary necromancer Grak by chance when an animate dead spell went awry. The bodies of men, dwarves and elves are imbued with a malevolent force that compels them to reach out and deliver a damaging touch which ignores armor. Their wits are dim, but they are fleet of foot. A dozen of them may suddenly rush forward to mob unsuspecting adventurers uttering “greep! greep!”

Any physical blow striking a Brown Greeper releases a blast of magical force in the form of an animate dead spell. Up to 4 HD of dead bodies rise as zombies and fight alongside their moronic masters. As such, they may be found with several zombies trailing along with them when encountered.

Brown Greepers can be found in cemeteries from which they range and return, bringing zombified victims back with them. When encountered in such a locus, a hoard of treasure type D will be found in a loose pile.

Here’s the random monster stats that come out of the generator.

Armor Class = 14 (or wears armor)
Hit Dice = 2 HD
8 feet, 180 pounds
Attacks = touch 3d10
Movement = 60
No. Appearing = 6d4, 8d12 in lair
Save As = Fighter
Morale = 12
Treasure Type = D
Animate dead if struck.
Looks like a ordinary humanoid.  
Semi-intelligent (5 INT)