Complete the prerequisite before collecting Gazkh Fragments.
Attack Sailren!, quest 641, requires completion of The Name of Evil - 2. Shilen's Stone Statue requests 30 Gazkh Fragments from Velociraptor and Pterosaur. Return them and follow the statue's quest dialogue for the entry preparation.
The fragment quest is gated by The Name of Evil - 2. Confirm completion of that prerequisite before collecting materials for Shilen’s Stone Statue. For Attack Sailren!, the named fragment targets are Velociraptor and Pterosaur; other dinosaur hunts on the island can belong to different quests. Keep Gazkh Fragments separate from Dinosaur Tissue, eggs or ordinary crafting components when checking your progress.
The collection requirement is 30 Gazkh Fragments. The next recorded step is to return to Shilen’s Stone Statue with all 30 and continue its dialogue. Having a partial stack is not completed entry preparation. This is a repeatable access objective, so check its current state before another attempt rather than assuming that a previous visit permanently unlocks every future entry.
Confirm which character is handling the statue’s quest dialogue and whether its prerequisite and fragment delivery are complete before asking the group to travel. The catalogue identifies this quest as a group hunting objective. It does not establish from that label alone that every member has a permanent pass or that one member’s partial progress unlocks the lair.