| 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 |