Casting Spells in Unusual Conditions (CWH)

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A wizard's adventures can take him to all kinds of exotic locations. But if he finds himself battling foes beneath the ocean's surface or exploring a mysterious locale in an alternate plane of existence, he will discover that his spells are operating a little differently than usual. This chapter explains the differences.
Spell casting abilities can also be affected by sensory changes, such as a temporary loss of vision, an impaired ability to speak, and impaired movement. These problems, as well as how a wizard's spells are affected when cast under less than optimum conditions and how he might compensate for these differences, will be discussed in this chapter.