This spell summons an extraplanar creature (typically an outsider, elemental or magical beast native to another plane). It appears where designated and acts immediately, on the caster's turn. It attacks caster's opponents to the best of its ability. If caster can communicate with the creature they may direct it not to attack, to attack particular enemies or to perform other actions.

The spell conjures one of the creatures from the 1st-level Summon Monster Table. The creature type is chosen and can be changed each time the spell is cast.

A summoned monster can not summon or otherwise conjure another creature, nor can it use any teleportation or planar travel abilities. Creatures can not be summoned into an environment that can not support them. For instance, a celestial porpoise may only be summoned in an aquatic environment. Creatures in the 1st-level Summon Monster Table this colour may only be summoned into an aquatic environment.

When using a summoning spell to summon air, chaotic, earth, fire, good, lawful or water creatures, it is a spell of that type (Descriptor). For example, Summon Monster I is a lawful and evil spell when cast to summon a fiendish dire rat.

Arcane Focus: A tiny bag and a small (not necessarily lit) candle.