Skull Fortress

Skull Fortress
Area Info
Region	Deep Sea
Category	Special
Unlocked By	Obtain a minimum of 40 dragons
Dragons Available	3

Skull Fortress is a special Exploration area in the Deep Sea region where you progress through stages by fighting an assortment of monsters to obtain eggs and other rewards. There are 3 dragons available in this area.

This area is locked and must be unlocked for any account(s) made after March 21st, 2024.

Entering the Skull Fortress

When you enter the Skull Fortress, you are able to progress through stages of battles against various monsters in order to obtain rewards.

You are able to select 3 Deep Sea dragons of your choosing to go up against the monster of that stage. Each monster has different types that cycle through a specific order, and you can select dragons that have an advantageous type against that monster to deal more damage.

The battle does not require any input from the player and is based on luck. The dragons attack on their own and both dragons and monsters have a low chance of performing a critical attack.

The outcome of the battle is affected by your dragon's Combat Power as well as the skills you have equipped to them. Combat Power is affected by the Cosmic Album score of the Deep Sea category as well as if you've beaten any Promotion Battles.

Equipment

Various items can be equipped to your dragons to increase their stats and give them special abilities.

Skills

Skills are obtainable through the Skill Gacha and can be equipped to your dragons to perform a special attack. These attacks can either boost your teams stats, debuff the enemy, heal, and/or deal damage. Skills have different grades and rarities that determine their power, and can be infused to increase either of them. Below is a table of all skills usable in the Skull Fortress.

All skills have an activation chance of 100% and a cooldown of 2 turns.

For a list of all skills, including their power for each grade and rarity, see the Combat Skills page.

Skill	Description
Barrier	Grants 2 stack(s) of Barrier to all allies. Targets affected by Barrier have their DEF increased by X% of the caster's current DEF and lose a stack at the end of their turn.
Bloodthirst	Deals damage equal to X% of current ATK to a random enemy, and heals equal to Y% of current ATK.
Bone Shatter	Deals damage equal to X% of current DEF, and inflicts 3 stack(s) of Bone Shatter. Targets affected by Bone Shatter have their evasion reduced by 100% and lose one stack at the end of their turn.
Fury Strike	Deals damage equal to X% of current ATK to a random enemy. Damage increases by up to 200% based on the percentage of HP lost.
Identify Wounds	Inflicts a random enemy with 3 stack(s) of Identify Wounds. Targets affected by Identify Wounds lose a stack when hit and receive an additional X% of damage taken.
Savage Instincts	Grants 2 stack(s) of Savage Instinct to all allies. Targets affected by Savage Instinct have their ATK increased by X% of caster's current ATK and lose a stack at the end of their turn.
Shield Bash	Deals damage equal to X% of current DEF to a random enemy. Damage increases by up to 300% based on how much higher the DEF is compared to ATK.
Steel Claw	Grants 3 stack(s) of Steel Claw, and deals damage equal to X% of current ATK to a random enemy. Targets affected by Steel Claw have their ATK increased by 10% of caster's max HP and lose a stack at the end of their turn.
Wrath of God	Deals damage equal to X% of current ATK to all enemies.

Orbs

Orbs can be obtained by beating specific stages in the Skull Fortress and can be equipped to your dragon, giving its skill a special effect. Only one orb can be equipped to a dragon at a time, and the same orb cannot be equipped to multiple dragons. Below is a table of all of the orbs usable in the Skull Fortress.

Orb	Description	Obtained At
Indomitable Will	Increase skill cooldown by 1. If HP is 50% or less, reduce cooldown by 1 instead.	Stage 50
Sure Strike	This skill can be activated two times with a 100% chance. Afterwards, this skill cannot be used.	Stage 250
Curse Counterattack	The skill activation condition has changed to the following. If this skill can be cast and caster has a debuff, activate this skill immediately. The skill cooldown does not decrease per turn, but decreases by 1 every time you receive a debuff.	Stage 350
Burning Vengeance	The skill activation condition has changed to the following. If other allies have died, activate this skill immediately with double the power.	Stage 550
Cross Counter	The skill activation condition has changed to the following. If hit by a crit, ignore the cooldown and activate the skill immediately.	Stage 650
Ultimate Blow	On the first turn of the equipped dragon, this skill is cast with triple the power. Afterwards, this skill cannot be used.	Stage 850

Ornaments

Ornaments can obtained by beating stages or through the Daily Patrol and can be equipped to your dragon to boost their stats, such as their attack, defense, health, critical chance, or evasion chance. Only one ornament can be equipped to a dragon at a time. Each ornament has a different grade which determines its power. Below is a table of all ornaments available to use in the Skull Fortress.

For a list of all ornaments, including their power for each grade and rarity, see the Combat Ornaments page.

Ornament	Description
Deep Sea Dawn Guardian's Crystal Ball	Increases DEF by X%.
Deep Sea Nightmare Guardian's Crystal Ball	Increases HP by X%.
Deep Sea Twilight Guardian's Crystal Ball	Increases ATK by X%.
Deep Sea Earth Horn (DEF/ATK)	Increases DEF by X% and ATK by Y%.
Deep Sea Earth Horn (DEF/HP)	Increases DEF by X%, and HP by Y%.
Deep Sea Fire Horn (ATK/DEF)	Increases ATK by X%, and DEF by Y%.
Deep Sea Fire Horn (ATK/HP)	Increases ATK by X%, and HP by Y%.
Deep Sea Water Horn (HP/ATK)	Increases HP by X%, and ATK by Y%.
Deep Sea Water Horn (HP/DEF)	Increases HP by X%, and DEF by Y%.
Deep Sea Wind Horn (ATK/DEF)	Increases ATK by X%, and DEF by X%.
Deep Sea Wind Horn (ATK/HP)	Increases ATK by X%, and HP by X%.
Deep Sea Wind Horn (HP/DEF)	Increases HP by X%, and DEF by X%.
Deep Sea Worn Claw	Increases Crit Rate by X%.
Deep Sea Shabby Feather	Increases EVA chance by X%.
Deep Sea Dragon's Claw	Increases Crit Rate by X%.
Deep Sea Dragon's Feather	Increases EVA chance by X%.
Deep Sea Warrior's Claw	Increases Crit Rate by X%.
Deep Sea Warrior's Feather	Increases EVA chance by X%.
Deep Sea Dark Guardian's Claw	Increases Crit Rate by X%.
Deep Sea Dark Guardian's Feather	Increases EVA chance by X%.
Deep Sea Arha's Horn	Increases Crit Rate by X%, and EVA chance by X%.

Gems

Gems can obtained by beating stages or through the Daily Patrol and can be equipped to your dragon to boost either of their three main stats: attack, defense, and health. Three gems can be equipped to a dragon at a time, and gems can be infused to increase their grade or rarity.

For a list of all gems, including their power for each grade and rarity, see the Combat Gems page.

Monsters

Monsters can be encountered in the Skull Fortress with various skills they can use. Each monster has two color variants, though their difference is only in aesthetics.

All monsters encountered will cycle through an elemental type order: Fire, Water, Wind, Steel, Earth, Lightning, Light, Dark, Dream, then back to Fire, and so on.

Percentages marked with an * are their base percentage and will increase based on stage progression.

Monster	Combat Type	Skill
Hasar	Health	Poison Thorn Attack Deals damage equal to 2.5*% of (max HP + target's max HP) to the enemy closest to the front and inflicts Paralysis for 1 turn(s). Targets affected by Paralysis have a 50% chance to not act.
Deep Sea Hasar
Bomba Jelly	Health and Defense	Bomb Drop Grants Bomb for 8 turns. When Bomb has one turn left, throws bombs at all enemies dealing damage equal to 1,000% of those enemies' max HP.
Deep Sea Bomba Jelly
Combat Fisherman	Health and Attack	Ground Pound Deals damage equal to 10*% of current ATK 5 time(s) to all enemies.
Deep Sea Combat Fisherman
Dior	Defense	Steel Pincer Deals damage equal to 90*% of current DEF to a random enemy and inflicts Reduced Defense for 3 turn(s). Targets affected by Reduced Defense have their DEF reduced by 50*% of caster's DEF.
Deep Sea Dior
Shark Warrior	Attack	Spear Swipe Deals damage equal to 150*% of current ATK to a random enemy.
Deep Sea Shark Warrior
Demon Shelter	Attack and Defense	Quick Attack Deals damage equal to 50*% of current ATK to a random enemy and grants Barrier for 3 turn(s). Targets affected by Barrier have their damage taken reduced by 660% of caster's current DEF.
Deep Sea Demon Shelter

Boss Dragons

When you beat a boss dragon's stage for the first time, you will be rewarded an egg of their respective species.

Monster	Combat Type	Skill
Takchaka	Defense	Torrent Deals damage equal to 30% of current ATK to all enemies, and grants Torrent for 2 turn(s). Targets affected by Torrent have their EVA increased by 300%.
		Quake Deals damage equal to 133.5*% of current ATK to a random enemy, and grants Vibration for 3 turn(s). Targets affected by Vibration have their EVA increased by -100%.
Kalavinka	Attack	Chaos Grasp Can only be used when HP is 30% or higher. Deals crit damage equal to 100% of ATK to a random enemy, and grants Chaos for 3 turn(s). Targets affected by Chaos have their ATK and Def increased by -25%.
		Ultimate Power Can only be used when HP is 30% or lower. Deals damage equal to 280*% of ATK to a random enemy. Cannot be evaded.
Vritra	Health	Distorted Roar Inflicts all targets with Distorted Roar for 2 turn(s). Targets affected by Distorted Roar receive true damage equal to 20% of target's max HP at the end of the turn.
		Presence of Hatred Deals damage equal to 85*% of current ATK to all enemies. Damage increases by up to 300% based on the difference between the caster's HP and the target's lost HP.

Dragon List

Special dragons can be obtained from the Gap of Chaos by clearing boss dragon stages. These dragons will be sent to your mail and cannot be traded.

Sprites		Obtainment Info
Dragon	Egg	Stage Levels
Takchaka
		Stage 100, 400, 700
Kalavinka
		Stage 200, 500, 800
Vritra
		Stage 300, 600, 900

Daily Patrol

The Daily Patrol is a mini feature within the Skull Fortress where you are able to go on an exploration to obtain rewards and possibly dragon eggs depending on the highest stage you've beaten in the Skull Fortress. The Daily Patrol can be done once per day, with five additional runs able to be done through using Amethysts. The first and second run will cost 500 Amethysts, then 1,000, then 2,000, then 4,000 for the final run.

Any dragon eggs obtained from the Daily Patrol will be tradeable. Dragon eggs can be obtainable through Daily Patrol by clearing certain stages.

Egg	Stage Unlocked
Takchaka	Stage 300
Kalavinka	Stage 600
Vritra	Stage 900

Promotion Battles

Promotion Battles are special battles you can engage in that will permanently buff your dragons' stats by a certain percentage. You can unlock the next level of Promotion Battles by beating the previous level. Once a Promotion Battle has been beaten, it cannot be rebattled.

It's important to note that the Promotion Buff Rewards do not stack. The rewards change the percent boost to your dragons' stats. For example: Beating stage 3 will change your stat boosts from 10% to 15%, it will not add 15% to the already-existing 10% boost.

Battle	Combat Power	Buff Reward
Deep Sea Bomba Jelly	41,869 Combat Power	5% Stat Boost
Deep Sea Combat Fisherman	86,178 Combat Power	10% Stat Boost
Deep Sea Shark Warrior	156,061 Combat Power	15% Stat Boost
Deep Sea Dior	230,813 Combat Power	25% Stat Boost
Takchaka	343,557 Combat Power	40% Stat Boost
Kalavinka	486,262 Combat Power	70% Stat Boost
Vritra	655,665 Combat Power	100% Stat Boost