The Rune of the God of Death, Charon. It has the symbol of a skull.
Level - Cast - Details Edit
|Lv. 1||Summon - Charon||Allows you to summon the familiar, Charon .|
|Lv. 2||Charon: Power Up||Movement speed of Charon increased.|
|Lv. 3||Skullmage: Power Up||Max MP of Skullmage increased.|
|Lv. 4||Charon: Anima Drain||Attack enemies with familiars riding aboard.|
- Acheron is one of two runes that only have four levels, the other being Gehenna .