The Agta, Bawo, or Ungo appears as a muscular, black-skinned humanoid, and can vary its size instantly between 1 ft. and about 30 ft. It is generally about 10-12 ft. in height, which may be its natural size.
As it increases in size, it becomes stronger, as follows: when it shrinks to 1 ft., it has 2 hp, attacks as a 1 HD monster, and causes 1d4 damage on a successful hit. It can enlarge itself to a maximum height equal to half its maximum hit points (as rolled on 8d8) in feet, i.e. an Agta with 54 hp can reach a maximum height of 27 ft. For every 4 ft. of its height it attacks as a monster of 1 HD and cause 1d4 damage. Thus, at 1-4 ft. it attacs as a 1 HD monster and causes 1d4 damage, at 5-8 ft. it attacks as a 2 HD monster for 2d4 damage, and so on, up to a maximum of 8 HD and 8d4 damage.