Guides / FINAL FANTASY XV WINDOWS EDITION

Costlemark Tower

FINAL FANTASY XV WINDOWS EDITION guide · Chapter 15

Costlemark Tower is an optional endgame dungeon located in the Fallgrove that can only be entered at night. Players navigate a maze of shifting floor puzzle blocks and descending platforms to reach the lower sanctum. Defeating the dungeon's final boss awards the Sword of the Tall, one of the thirteen Royal Arms.

Items

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Sword of the Tall: In the boss chamber of Costlemark Tower after defeating the Jabberwock

Secrets

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Menace Beneath Costlemark | Accessible through a locked vault door behind the main boss arena after obtaining the Sealbreaker's Key from Ezma in Chapter 15

Enemies

Jabberwock

Weak to Polearms, Machinery, Ice, LightSteal / drop Jabberwock Horn

The main dungeon boss that can inflict Petrify

Red Flan

Weak to Light

Highly resistant to all physical weapon types

Yojimbo

Weak to Swords, Daggers, Lightning, Light

Fast-striking daemon wielding a katana

Iron Giant

Weak to Greatswords, Shields, Lightning, Light

Often spawns in groups in the lower puzzle room if the wrong block path is chosen

Tips

The entrance to Costlemark Tower only opens between the in-game hours of 20:00 and 04:00.
Pack accessories or food buffs that grant Petrification immunity before challenging the Jabberwock.
In the deep Menace dungeon floor path, item usage is disabled, making magic flasks with healcast and regeneration camp food essential.

Not listed for this area: shops and people.

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Pitioss Ruins

Daurell Caverns

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