Combust

Description
Combust causes flames to erupt around the touched creature, initially causing fire damage in the amount of 2d6 + 1 per caster level points, to a maximum of +10 points, with no saving throw. Each round after the casting the target must succeed at a reflex saving throw or take an additional 1d6 points of damage. This continues until the reflex saving throw is successful.

External resources

 * NWNWiki:Combust