Trial:001

Overview
Brave Knight Karl is a Mock Unit located at the Summoners' Research Lab in Imperial City Randall. The fight itself is composed of a single battle against Karl's two forms, Brave Knight Karl and Ice Warrior Karl. He is only obtainable through the completion of Trial No. 001.

Rewards

 * Brave Knight Karl
 * 1 Gem
 * 500,000 Zel
 * 20,000 EXP

Preparation
You may use up to 3 squads and 1 item set for this battle. Each of the squads must have unique units in them and you are allowed up to double your total cost. You select a different friend from your entire friends list for each squad that you can bring in. There is no cooldown when using a friend to fight Karl. Your items do not get replenished when a team dies, so bring as many healing items, elemental seals, and status cure items for paralysis/weakness as you can for this fight.

Water and Fire Elemental Units are not recommended for Karl can use Water, Thunder, and Earth based attacks.

Squads recommended:
 * Thunder
 * Light
 * Earth
 * Dark

Recommended Leader Skills:
 * 50% Attack Boost and 10% HP Boost to an element
 * Divine Gale
 * Ares' Excelsior

Units Recommended:
 * High HP
 * High Defense
 * Units who add thunder element to attack. These include Empyreal Drake Lodin, Inferno Princess Dia, Ember Sage Fiora, and Divine Whip Orna.
 * Units which mitigate damage. These include Guardian Darvanshel, Ice Fortress Oulu, and Mad King Narza.

Alternatively, you can just equip at least 1 of your units with the Guardian Cloak. It will take a while to beat him as you have to chip away at his health slowly. Be sure to use it on a unit with moderate damage so as to outdo his healing after he reaches below 15% hp on his 2nd form

Mono-Thunder Squad
The easiest (and more straight-forward) way to beat Karl involves bringing a mono-Thunder team of max level 5 star and 6 star units.

Possible leaders:
 * Holy Thunder Eze - 50% ATK Boost and 10% HP to Thunder Types
 * Heaven's Bow Loch - 50% ATK Boost and 10% DEF & REC to Thunder Types
 * Holy Shock Emilia - 50% ATK Boost to Thunder Types & fills BB gauge after each turn
 * Gold Queen Rina - 65% ATK Boost to Thunder Types
 * Mech God Grybe - 15% DMG reduction from Water Types & boost to damage dealt to Water types from Thunder types
 * Havoc Angel Ronel - Nullifies all status ailments & 10% boost to HP

Beast God Exvehl is an excellent substitute for Havoc Angel Ronel for removing and nullifying status ailments.

Select one (or two if you are worried) of three possible healer units to select based on your luck with rare summons. At the very least use a max-level Royal Dancer May that is Anima type and have BB level 10: Three remaining squad members should preferably be Anima/Lord/Guardian/Breaker type. First choices would be any of the units listed above in having desired leader skills. Other solid choices are: Each unit should be equipped with a stat-boosting sphere. Flesh Armor/Limbo Stone are okay, although all stat boost spheres such as Sacred Jewel/Medulla Gem would be better better. Items selected should include thunder seals/thunder ores/healing potions/fuijin potion. Use Fujin Potions as an emergency catch on your healer if you're caught with an unlucky BB string from Karl.
 * Royal Dancer May
 * Sky Mage Rashil
 * Fast God Lucana
 * Sky Legend Falma - Powerful Single Target BB
 * Omega Behemoth - Increases Spark damage
 * Empyreal Drake Lodin - Fills BB gauge for emergency heals
 * Heaven's Bolt Amy - Powerful Single target BB
 * Blaze Guru Bran - Def buff
 * Tesla Club Elulu - Huge damage but low defense
 * General Weiss - Atk buff
 * God Engineer Garnan - Crit and Spark buff
 * Lightning Gun Rowgen - Very excellent for unlimited SBB on Karl
 * Divine Whip Orna - BB fill buff when attacked

Karl's First Form
Has 400,000 HP, but only required to reach 50% HP (200,000 HP)

100% - 75% HP
 * Frozen Axe - AoE water attack used every 5 rounds

<75% HP
 * Flood Offensive - ATK buff and DEF debuff for 3 turns (Used only once)
 * Verdant Axe - Single target water and earth attack that inflicts weakness
 * Lightning Axe - Single target water and thunder attack that inflicts paralysis

<50% HP
 * Transforms into Ice Warrior Karl and regains all lost hp

Karl's Second Form
Has 500,000 HP

100% - 75% HP
 * Verdant Axe - Single target water and earth attack that inflicts weakness
 * Lightning Axe - Single target water and thunder attack that inflicts paralysis

<75% HP
 * Flashing Axe Combo - Single target water and light attack

<50% HP
 * Casts Blue Execution - Massive AoE water attack
 * Very powerful. Can wipe out any water/earth/light/dark unit with less than 6.5k hp. Fire units should proceed with caution
 * It is recommended to use one unit to get him down to 50% HP and guard the rest or activate mitigation and attack with high hp units
 * Cursed Blue Slash - AoE water attack

<15% HP
 * Tidal Offensive - 3 turn DEF and heal over time buff
 * Leeches hp with every attack

Karl can be Paralyzed though he has a very high resistance to it.

When using a mono team, the use of seals is recommended. Having the 50% defense boost as well as guarding with healers is highly recommended.