The Vanishing Journey area in Arcane River has a total of 23 quests in order to finish the quest line and receive your Arcane Symbol but only 11 of them require any work outside of just talking to NPCs.
1. A Greater Power
Defeat 10 Happy Erda
*You will be doing 10% of your total damage to these Erdas
2. Gathering Scattered Memories (1)
Obtain 30 Happy Memories from Happy Erdas
2. Gathering Scattered Memories (2)
Obtain 50 Raging Memories from Raging Erdas
3. Gathering Scattered Memories (3)
Obtain 70 Sad Memories from Sad Erdas
4. Gathering Scattered Memories (4)
Obtain 90 Joyful Memories from Joyful Erdas
5. Taming the Flame (1)
Collected 40 Solid Claws from Stone Erdas
(Arcane Force 50, you’ll be doing only 60% damage)
6. Taming the Flame (2)
Collect 60 Sticky Oils from Blazing Erdas
7. Taming the Flame (1)
Collect 80 Hard Shells from Soulful Erdas
8. The Solution is Dissolution (1)
Collect 50 Tranquil Solvents from Tranquil Erdas
(Arcane Force 80, you’ll be doing only 38% damage)
9. The Solution is Dissolution (2)
Collect 70 Tranquil Solvents from Tranquil Erdas
10. The Solution is Dissolution (3)
Collect 90 Tranquil Solvents from Tranquil Erdas
11. Defeat Arma
Defeat Arma