I want to build the next adventure site around a unique, bespoke enemy, so I am going to roll one up! (see page 190 of the SD rules)
Combat = d20 = 9 = PL (party level) = LV 3
Quality = d20 = 2 = Avian
Weakness = d20 = 10 = Silver
AC 13, +3 beak, 1d8 damage.
Now let's mutate it! (page 191)
Mutation 1 = 1d12 = 1 = Shapechanger (ooh, this goes well with the silver weakness)
Mutation 2 = 1d12 = 8 = Life Draining Touch (we will say that hit point damage it does cannot be healed naturally)
Mutation 3 = 1d12 = 10 = Blood draining bite.
Okay. I got it. Ladies and Gentlemen and Children of All Ages: the Were-Stirge!
One of the reasons I love random tables is this: i would never have decided to put a were-stirge in an adventure on my own.
What ChatGPT thinks a were-stirge looks like: