| Casting Time | Check DC Modifier or Modification |
| Casting time is restricted (such as "only during a full moon") | -4 |
| Casting time is severely restricted (such as "only during a lunar eclipse") | -8 |
| Focus and Material Components | |
| Expensive material component (500 gp) | -1 |
| Expensive material component (5,000 gp) | -2 |
| Expensive material component (25,000 gp) | -4 |
| Expensive focus (5,000 gp) | -1 |
| Expensive focus (25,000 gp) | -2 |
| Range | |
| Greater range than normal | +1 to +6 |
| Shorter range than normal | -1 to -4 |
| Area | |
| Larger area than normal | +1 to +6 |
| Smaller area than normal | -1 to -4 |
| Target | |
| Unwilling target must be helpless | -2 |
| Limited targets (by HD, creature type, and so on) | -3 |
| Single target to multiple targets | +4 |
| Duration | |
| Greater duration than normal | +1 to +6 |
| Shorter duration than normal | -1 to -4 |
| One year or more | casting time in increments of 1 hour/level instead of 10 minutes/level |
| Backlash | |
| Per 2d6 points of damage | -1 |
| Caster is exhausted | -2 |
| Per temporary negative level caster gains | -2 |
| Per permanent negative level caster gains | -4 |
| Caster reduced to –1 hp | -3 |
| Caster infected with disease | -4 |
| Caster suffers curse effects | -4 |
| Backlash affects secondary casters too | -1 |