Elementals attack everyone (including the summoner), damaging anyone who is not resistant to its type (heat or cold), or shielded. They cause three points of damage to each victim, per turn.
An elemental can be killed by three or more points of damage, in which case it still attacks for the turn in which it is killed, or may be destroyed by spells of the opposite type.
A Fire Elemental is instantly destroyed (and does not attack on the turn) by Ice Storm, Summon Ice Elemental, Resist Fire or Fire Storm. Also, each of these spells will be neutralised if a Fire Elemental is present, except Resist Fire or Fire Storm. A Fire Elemental is unaffected by a Fireball.
An Ice Elemental is instantly destroyed (and does not attack on the turn) by Fire Storm, Summon Fire Elemental, Resist Cold, Fireball or Ice Storm. Each of these spells will be neutralised if an Ice Elemental is present, except Resist Cold or Ice Storm.
A new Elemental of the same type will supplant the first.
Casting a Fireball upon yourself when being attacked by an Ice Elemental is not a defense as it is for an Ice Storm. (Cast Fireball at the elemental.)
Elementals first attack on the turn in which they are summoned, and if physically destroyed, also attack on the turn in which they are killed.