| Modifier | Condition
|
| +5% | Caster is a necromancer
|
| +5% | Caster has spirit lore proficiency
|
| +10% | Caster is a member of the Witch kit
|
| None | Subject dead for up to 1 week
|
| -5% | Subject dead for up to 1 month
|
| -10% | Subject dead for up to 1 year
|
| -15% | Subject dead for up to 10 years
|
| -20% | Subject dead for up to 100 years
|
| -30% | Subject dead for up to 1000 years
|
| -50% | Subject dead 1000 years +
|
| -25% | Spell cast by day
|
| None | Spell cast at night
|
| +10% | Spell cast at full moon
|
| +25% | Cast on a holy day associated with the dead
|
| +10% | Ancestor present at summoning
|
| -10% | Spirit previously summoned within the same month
|