|Closer to what I'm thinking of than a search for Drider brings up.|
Thanks to Arachne, Dante, Dore and Wikicommons for this.
Driders aren't a species to themselves, and will be known by chosen/given names or possibly by a local/legendary name for spidertaurs (eg. Jorogumo).
In this conception, Driders have nothing to do with Lolth or the Drow; are no more common in Japan than anywhere else, and have no association with Atlach Nacha or Leng unless they themselves seek it - they can expect no particular favour for similarity of form.
Drider, Venom Bloated Composite Multipede.You become a Drider because you find a way to bind yourself to a giant spider-like body in order to extend your lifespan to study the foul & forbidden, because the Mi-Go do elective/involuntary surgery on you, or because you are struck by a curse.
Humanoid Part (when operating on a human scale, eg. embroidery, throwing rocks, picking pockets)
- Human weapons, base % + Humanoid DEX, no db. No particular reason a Drider wouldn't use a bow-and-arrow, and no reason it wouldn't use a revolver either.
- Grapple, base % + Humanoid STR & DEX. Against human scale targets only; if successful, will Bite on the next round.
- Bite, automatic if Grappled. 1d4 hits + venom (the Drider can use some or all of its accumulated venom) and/or blood drain (d4 STR per round until dead or set free).
- Crush, 50%, damage = db. A Drider is big enough to crush multiple adult human-sized targets, one for every 12 whole SIZ points its spider body has. If able to jump or drop onto targets, it's 1 for every
Skills: Dodge (DEXx2 + INT); Climb 90% (but can climb any surface & hang from ceilings); Jump (STR+DEX); Hide 60%; Sneak 75%; Sense Vibrations 40%; Cast Horrendous Shadow 75%.
Spells: Any average Drider will know 0-7 (d8-1). These are unlikely to be directly Mythos related, unless the Drider's state is due to Mythos intervention.
Sanity loss: 0/1 to see a Drider’s horrendous shadow; 1/1d6+1 to see a Drider; 1/d10 to realise that you have become one.