Trial No. 001

__TOC__
==Overview==
Brave Knight Karl, similar but not identical to Karl of the 24th Division of Demon Slayers, 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.
==Overview==
It is highly recommended to have units that are at least 5★ rarity. A Thunder team is also recommended if you are using 5★ units.
This is a rather old trial, so units at higher rarities will be able to have a much easier time clearing this trial, even without much effort.
===Squad Building Recommendations===
Using Thunder units is recommended as you will be fighting Karl for the entirety of the fight. Note that the recommendations below are based on 5★/6★ standards.
Possible Leaders
* Gilded General Weiss - Small reduction in BB gauge amount consumed during BB & large boost to drop rate of BC produced during spark
* Thunder Legend Eze - 100% boost to Atk power and 30% increase in HP of Thunder types
* Celestial Archer Loch - 100% ATK Boost and 30% DEF and 50% to Spark damage 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
* Valkyrie Archangel Griel - Nullifies all status ailments, boost BC and HC drop rate, & 30% boost to HP
Recommended Thunder Units
* Royal Dancer May - Budget unit farmable from quests
* 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
* Zeus Whip Orna - BB buff when attacked (LS), Crit buff (SBB)
Recommended Non-Thunder Units
* Noble Cavalier Krantz - Excellent mitigator for reducing damage taken
* Battlemage Haile - Provides stat buffs and BB gauge fills
* Holy Defender Rinon - Excellent healer for restoring HP and curing status ailments
==Battle==
=== Brave Knight Karl===
*Can be inflicted with Poison
*Has 400,000 HP, but is required to only take down half of his max HP.
*Every 5 turns
**Frozen Axe - 6 combo Powerful Water attack on all enemies
*At < 75% HP
**Flood Offensive - Boosts ATK by 30% and reduces DEF by 50% for 3 turns
**Verdant Axe - 7 combo single target water and earth attack with a 30% chance to inflict injury and/or weakness
**Lightning Axe - 7 combo single target water and thunder attack with a 50% chance to inflict paralysis
*At < 50% HP
**Transforms into Ice Warrior Karl and recovers HP to max
=== Ice Warrior Karl===
*Can be inflicted with Paralysis and Injury
*Has 500,000 HP.
*Verdant Axe - 7 combo single target water and earth attack with a 30% chance to inflict injury and/or weakness
*Lightning Axe - 7 combo single target water and thunder attack with a 50% chance to inflict paralysis
*At < 75% HP
**Flashing Axe Combo - 7 combo single target water and light attack with a 25% chance to inflict injury, sickness and/or weakness
*At < 50% HP
**Blue Execution - 16 combo Massive (500% mod) Water attack on all enemies
**Cursed Blue Slash - 8 combo powerful Water attack on all enemies
*At < 15% HP
**Tidal Offensive - Boosts DEF by 80% and heals over time for 3 turns
**Leeches HP with every attack