Hmm, hat den das Feuerelementar Cover vor dir?
Cover and Attacks of Opportunity: You can’t execute an attack of opportunity against an opponent with cover relative to you.
Aber:
Big Creatures and Cover: Any creature with a space larger than 5 feet (1 square) determines cover against melee attacks slightly differently than smaller creatures do. Such a creature can choose any square that it occupies to determine if an opponent has cover against its melee attacks. Similarly, when making a melee attack against such a creature, you can pick any of the squares it occupies to determine if it has cover against you.
Hmm, schön langsam wirds haarig mit den Regeln...
Ach ja, wegen copyright: Alles ausm SRD