Substituting and Admixing Energy

When you alter a spell with Energy Substitution or Energy Admixture feats, the spell behaves exactly as the normal version does, except for the type of damage dealt. For example, a Fireball with acid energy substituted for fire or admixed with acid still deals damage in a 20-foot spread.

If a spell has a secondary effect, so does the altered version. For example, a Shout spell can deafen creatures and deals extra damage to crystalline creatures. If fire is substituted for sonic energy, the altered Shout spell still has these effects, but deals fire damage instead of sonic. Sometimes, however, a spell's minor effects are directly related to its energy type; for example, a Fireball can set things alight, but a sonic or acid Fireball cannot.

When a spell deals some damage that is not energy-based, that portion of the spell cannot be affected by Energy Admixture of Energy Substitution. For example, Ice Storm deals 3d6 points of impact damage and 2d6 points of cold damage. Substituting electricity for cold produces an Electric Storm that deals 3d6 points of impact damage and 2d6 points of electricity damage. Energy Admixture, however, matches the full amount of damage dealt by the spell. For example, an Electric Ice Storm would deal 3d6 points of impact damage, 2d6 points of cold damage, and 5d6 points of electricity damage.