Rolls on four tables from the Ironsworn: Delve supplement: Size, Form, Characteristics, Abilities.
Based on the Ironsworn Delve supplement by Shawn Tomkin (https://www.ironswornrpg.com) available at DriveThruRPG.
Size: Roll on "Ironsworn Delve—Monstrosity Size"
Form: Roll on "Ironsworn Delve—Monstrosity Form"-like
Characteristics (pick up to three):
Roll on "Ironsworn Delve—Monstrosity Characteristics"
Abilities (pick up to three):
Roll on "Ironsworn Delve—Monstrosity Abilities"
Disposition: Roll on "Ironsworn Delve—Character Disposition"