Elemental swarm

Elemental Swarm is a conjuration spell that summons between two and eight large and one to four huge elementals whose element depends on the plane from which they are summoned. Its descriptor when cast is the same as the element of said elementals.

Effect
This spell opens a portal to an Elemental Plane. A druid can choose which plane (air, earth, fire, or water); a cleric opens a portal to the plane matching his domain. You can then summon elementals from that plane.

When the spell is complete, between two and eight large elementals appear. Ten minutes later, one to four huge elementals appear. Ten minutes after that, one greater elemental appears. Once the elementals appear, they serve the caster for the duration of the spell.

The elementals obey the caster explicitly and never attack him, even if someone else manages to gain control over them. The druid does not need to concentrate to maintain control over the elementals. He can dismiss them singly or in groups at any time.

When a druid uses a summoning spell to summon an air, earth, fire, or water creature, it is a spell of that type. For example, elemental swarm is a fire spell when you cast it to summon fire elementals and a water spell when he uses it to summon water elementals.