From:lineage2.com

Event Gatekeepers

Speak to the special Event Gatekeepers in any town to teleport to nearby hunting grounds for a discounted price.

Subclass Skill Certificate Exchange

We are offering players a chance to exchange their level 75 subclass skill certificate for another one of their choice. Players must have a level 75 or higher subclass in order to participate in this event. The Subclass Certification Helper who can help you with this exchange is located on the second floor of Ivory Tower, next to Avant-Garde.

Adventurers' Guides

The Adventurers' Guides are stationed in Gludin Village, the Town of Gludio, and the starting villages to assist new players.

If you are a character level 6 or above, you can acquire a special novice adventurer's weapon. Speak with the Adventurers' Guide to receive an exchange certificate for the special weapon. Speak to her again to choose your weapon, and you can exchange for a different weapon of the same level at any time.

Any character with a PK count of one or more is not eligible to receive a certificate.

Read more here.