We're missing a duration and effective caster level for the Stasis Venom.
2d4 days like a Spiny Sleeper?
CL 3 to match it being a 3rd level Improved familiar?
It's still got a "Description" place holder if we want to add some flavour on habitat/diet/behaviour et cetera.
I'm thinking of the following, plus anything else you fancy.
Copper opossums are a magical breed of opossum. They are only found in areas with a source of copper, such as an exposed seam of copper ore, since they need to eat small quantities of that metal to survive. A copper opossum's ideal habitat is an area of foothills with abundant trees, streams, and a supply of high-grade ore or raw copper.
That's based on the original critter living in the Farrowdale hills.
I'm going to change the environment to "Temperate hills" to match the original's habitat.
I'm also increasing the CR to 1/2. That's what we gave the Spiny Sleeper, which has a similar poison.
Apart from that, I think it's about done. Might run over the stats one last time just to be safe.
