Tarti in the Town of Gludio told you about the training method of Ertheias, and said that there’s are consumables that are absolutely needed for training. Talk to Tarti again to hear about the consumables.

Tarti in the Town of Gludio told you about Soulshots and Spiritshots, and that you need to receive a buff to complete training for efficiently.

You’ve completed the preparations for the training through Tarti. Now go to the Ruins of Despair to train.

Monsters to Hunt - Nasty Eyes, Nasty Buggles

You have eradicated Nasty Eyes and Nasty Buggles in the Ruins of Despair. Use the scroll of escape in your inventory to return to Guard Silvan.

You received the reward for the first mission from Guard Silvan. But there are more missions, so talk to Guard Silvan.

Guard Silvan in the Ruins of Despair asked you to give peace to those in the ruins who are under the Curse of Undying.

Monsters to Hunt - Nasty Zombie, Nasty Zombie Lord

You have eradicated Nasty Zombies and Nasty Zombie Lord in the Ruins of Despair. Use the scroll of escape in your inventory to return to Tarti.

You received the reward for the second mission from Tarti. Now talk to Tarti for the Class Transfer.

Tarti said that the Ertheian training method is the fruit of long contemplation for the good of the Aden Continent, and she wished that you work diligently at your training to become a splendid warrior before long. She said that to do that, you need to first reach Lv. 20.