Monstrous Mondays: Monster of Lake Fagua for OSE

Today I wanted to get into a monster from my recent re-discovery of Daniel Cohen and a bunch of books I read as a kid and critical to my early ideas of what could be part of my D&D games.  One of those books was "Monsters, Giants and Little Green Men from Mars."

And one of those monsters was the Monster of Lake Fagua.

Appearing something like a large manticore, it reminded me a lot of the Piasa Bird.

The monster was said to have been "found in the kingdom of Santa Fe," in Peru, in the province of Chile, "in Lake Fagua, which is in the" lands of Prosper - Voston."  At least as reported in France on several prints sold in Paris in October 1784.

The creature was described as follows:

"Its length is eleven feet; the face is almost that of a man; the mouth is as wide as the face; it is furnished with two-inch teeth length. It has two 24 inch long horns which resemble those of a bull; hair hanging down to the ground; the ears are four inches long and are similar to those of a donkey; it has two wings like those of a bat, the thighs and legs are 25 inches; it has two tails, one very flexible, which it uses to grip the prey; the other, which ends in an arrow, is used to kill him; his whole body is covered with scales.”

It had been described as a relative to the harpy.  So let's keep that.  Potentially a manticore/harpy crossbreed.

Monster of Lake Fagua
(Old-School Essentials)

Armor Class 2 [18]
Hit Dice 8 (36hp)
Attacks [2 × claw (1d6), 1 × bite (2d4)] or 1 × tail spike (1d6+poison) or 2 x horn gore (1d4+1)
THAC0 13 [+7]
Movement Rate 90' (30') / 180' (60) flying / 360' (120')  swimming
Saves D8 W9 P10 B10 S12 (8)
Morale 9
Alignment Chaotic
XP for Defeating 1200
Number Appearing 1d4 (2d10)
Treasure Type None

• Amphibious Movement. This creature is equally at home on land, water or sky.  The fagua monster can spend up to 12 hours underwater. 
• Nocturnal. The creature is only active at night and can seel equally well in the dark. 
• Tail Grab. On a critical success on a tail attack (natural 20) the Fugua Monster can instead grab a victim and squeeze them each round for 1d6 points of damage. A Strength check is needed to escape.
• Tail Spike. The spike of the Fugua Monster has a paralytic poison. Save vs. Poison or become paralyzed for 1d4+2 rounds.

Nice to see this guy again!