Lloigor

Lloigor are invisible, reptilian beasts, though they can create visible forms if needed. In the past they have enslaved humans and used torturous means to keep them in line. The remaining Lloigor now reside under the earth and sea.

In the RPG...

The Lloigor are intangible when invisible, so cannot physically harm or be harmed in that state. However, while in their physical form, they are quite deadly, averaging 21 damage in a single attack. Also, they have 8-point armour, which means that bullets are all but useless against them. 

    Lloigor also have two unique traits. The first is that they can drain magic points from anyone within several miles, and second, have some weak telekinetic power, able to move objects of STR 5 per 10 magic points spent. Perhaps their greatest weapon is their Vortex Attack, whereby the space of a 10m sphere can be imploded for 1D100 damage. Luckily it requires 100 magic points, so would require 5 or more Lloigor to create together... or a lot of magic-point syphoning. A Spot Hidden/Listen roll will also allow an Investigator to notice the vortex forming and dive for safety.

    The only stats of the Lloigor's that the 7e Malleus Monstrorum has changed is their STR and DEX. Both still average the same, but the range of STR has increased while the range of DEX has decreased.

In a video game...

Lloigor are pretty fearsome and unique creatures, which I'm sure could be used to great effect in a video game. While tough, an average of 3 sticks of dynamite could take them out, so they aren't crazy-tough. Stumbling across a Lloigor den with various amputee slaves would also add a body-horror aspect to the encounter.

In a film...

To be honest, I'd never paid much attention to Lloigor in the past. I'd always seen their picture and thought, "Gee, a giant lizard, how scary," but since writing this entry, I've come to really like them, and would love to see them envisioned on screen.