Making Port O'nor
Spells are wielded by many of the heroes and villains of Dungeons & Dragons. Characters of different classes have different ways of learning and preparing their spells, but when it comes to casting them, the spells are very much alike.
This section provides an overview of the spell description format combined with a discussion of how spells work and what happens when magical effects combine.
Reading a Spell Description
A spell description is organized into several sections.
Name, Level, and Descriptors. The description starts with the spell’s name. The next line gives the spell’s level, its school of magic, and any additional descriptors, such as the ritual tag. These two lines are followed by a paragraph or two describing the spell.
Requirements. Some spells require special circumstances or specific items to be cast. If you cannot meet a spell’s requirements, you cannot cast the spell. A spell’s requirements are in addition to any requirements you normally have to meet for casting a spell.
Material Components. If a spell has material components, they are specified in this entry. Unless a spell says otherwise, material components are consumed when a spell is cast.
Combining Magical Effects
Although individual spells are fairly easy to adjudicate, sometimes the situation can be confusing when more than one spell is affecting the same creature.
Bonuses and penalties provided by spells all add together while the duration of those spells overlap, except for one case. Unless otherwise noted in a spell’s description, the effects of the same spell cast multiple times (including higher or lower-level versions of the same spell) do not add together. Instead, the highest bonus or worst penalty from those castings applies. Each spell still expires individually.