A number of animals grow to twice their normal size. This
doubles each animal's height, length, and width, increasing its
weight by a factor of eight. This increase in size has a number
Hit Dice: The creature's HD double, doubling the creature's
base attack bonus and increasing its saves accordingly.
Size: The creature's size increases one step. This increase
reduces its AC (according to the new size), reduces its attack
bonus (according to the new size), affects its ability to
grapple, and so on. The creature gains an enlargement bonus to
Strength and Constitution scores, and its damage with natural
attacks increases. This spell does not affect Colossal creatures.
When the spell ends, the creature's hit points return to
normal, and all damage the creature has taken while enlarged is
divided by 2.
The spell gives the character no special means of command or
influence over the enlarged animals.