Ancestral Horror is a Necromantic Spell (Mental Skill) of the Second Twilight Circle that Scarlett may use to cause her opponents to freeze and tremble in horror and fear for a short time. (Scarlett may use that time to either avoid the enemy or inflict further damage without retaliation.) The amount of time the enemy is paralyzed with fear varies with the Level of Mastery, as does the amount of Mental Energy required to cast the spell.
|Level|| Duration |
| Mental Energy|
| Casting |
| Cooldown |
|1||5 sec||7 ME||1.1 sec||2.5 sec|
|2||8 sec||11 ME||1.1 sec||2.5 sec|
|3||12 sec||17 ME||1.1 sec||2.5 sec|
|4||20 sec||28 ME||1.1 sec||2.5 sec|
Scarlett can only learn this Mental Skill after she has learned its prerequisite, Eye of the Lost, at the Gateway Idol in the Old Temple in Venice's Outer City, has accumulated sufficient Skill Points, and after she finds a Necromancy Trainer (probably Nox in the Backstreets of the Outer City).