By means of this spell the druid holds one to four animals rigid. Animals affected are normal or giant-sized mammals, birds, or reptiles, but not monsters such as centaurs, gorgons, harpies, naga, etc. That is, apes, bears, crocodiles, dogs, eagles, foxes, giant beavers, and similar animals are subject to this spell. The hold lasts for 2 melee rounds per level of experience of the druid casting it. It is up to the druid as to how many animals he or she wishes to hold with the spell, but the greater the number, the better chance each will have of not being affected by the spell. Note that a maximum body weight of 400 pounds (100 pounds with respect to non- mammals)/animal/level of experience of the druid can be affected, i.e. an 8th level druid can affect up to four 3,200 pound mammals or a like number of 800 pound non-mammals such as birds or reptiles. Each animal gets a saving throw: if only 1 is the subject of the spell, it has a penalty of -4 on its die roll to save; if 2 are subject, they each receive a penalty of -2 on their die rolls; if 3 are subject, they each receive a penalty of 1 on their die rolls; if 4 are subject, each makes a normal saving throw.