Mythras Encounter Generator strives to help the busy GM in creating creatures for Mythras campaigns easily.
Weird of Hali – a gateway supplement to Mythras is full of Cthulhu creatures and other goodness (mad scientists, cultists, poisons etc). Here is a first set of Cthulhoid creatures in MeG format.
What if your PC’s benefactor turned out to be Valusian Serpent People Infiltrator whose carpet turned out to be Shoggoth,Household and whose trusted servants were actually a tribe of blood thirsty Voormis Warriors. If you wait too long to escape the Flying Polyp could find its way in. In the outskirts of the mountains the mining operation was actually a Mi-Go enterprise – protected by Mi-Go Warrior and the reason for the odd dwindling of the fisheries is that a colony of Deep Ones has appeared.
There are other shoggoths as well – the normal Shoggoth,Adult and the mighty Shoggoth,Antarctic. There is also a Cthulhoid Ghoul. Other Cthulhu creatures in the MeG (with stats from other sources) _ Nightgaunt and Shoggoth
The MeG contains currently 3966 published templates for NPCs and monsters for various campaigns – the content is crowdsourced and it is easy to find creatures or add new ones. There exists also tools to get the info in json format and insert that into roll20 or Foundry