Every player will have the opportunity to receive Gray from participating in the Event.
This is a recommendation of how you should set your support formation up for maximum friend points.
Emphasis on bonus servants and support casters.
Put Bella Lisa or Mona Lisa on Caster during Raids.
Event Walkthrough Part 1
This section details the step by step is completing the Main Story and all 100 missions.
Here are a few guidelines to follow:
Raid + Walkthrough Part 2
Raid + Walkthrough Part 2 - Starts on 5/5 - 21:00 PDT - Login Reset
The moment the Time lock lifts, immediately complete Act 10-2 (Barbatos - 500,000 HP. Randomly Debuffs Card Effectiveness, Star Generation, and/or HP Recovery.) to unlock the Raid and begin farming while it lasts.
Barbatos Raid ~ 50 Million Kills shared globally
Control Room Barbatos (Assassin) - 500,000 HP
Traits: Sky, Undead, Large
Farming this Raid is highly recommended, the individual material drop rates for this Raid is comparable or even superior to that of singularity free quest, all obtainable from a single 1-2 turn battle for just 30 AP.
Walkthrough Part 2
Once you have completed the Raid, you can finish the event at this point on.
1 - Clear Section 10.3(Fight Barbatos one last time).
2 - Clear Section 11.1 - 11.2(Let the Boss fire off NP to end the battle).
3 - Final Battle.
4 - Watch the Epilogue Cutscene to make Gray Permanent and receive a Holy Grail.
Final Battle - Mnemosyne
Class: Rider
HP: 224,788 / 254,760 / 284,732
Traits: Undead, Large, Sky
50% Resistance to all damage.
Summons Da Vinci shadow servants every turn if none are on the field (Not required to defeat to win)
Drains NP Gauge and Skill Seal(3 Turns) on a servant.
Noble Phantasm will remove all buffs before inflicting damage and ignores any defense.
Breaking a bar will cause all servants will have their NP gauge drained by 50% and be inflicted with NP/Skill Seal.
Beating the Mnemosyne:
1 - Mnemosyne attacks are all AOE, meaning all servants take damage.
2 - Caster Servants will not last long without any defensive buffs: 1-2 turns. You can use this to your advantage by having new caster supports come in as the previous ones die.
3 - Only keep on field support servants that you don't mine losing the current turn or next turn.
4 - Single target Alter-egos and Assassins come in handy. You can also use Gray for this battle since she receive a significant damage bonus for this event along with an undead damage bonus.
5 - Use a combination of NP and Criticals to kill the boss. NP when you can and use Critical Damage for the following turn when your bar is drained.
6 - You can ignore the Shadow Servant as it will prevent the boss for having too many attacks in a row and you don't need to kill it for the battle.
7 - Have debuff cleansing and/or immunity support such as Martha and BB, since the boss will inflict NP/Skill Seal that can last 3 turns.
Post Story
Completing the remaining missions + Challenge Quest
At this point in time you should have complete atleast 80 Missions. You can farm the below Free Quests to complete the remaining missions and obtain Event Currency(Bolded means best):
-Chocolate Gardens(Noble Timepiece): Skeletons, Assassin Servants.
-Counterfeit Art Gallery(Formal Leaves): Golem Enemies
-Csejte Castle(Dandy Rabbits): Blade Wing Insect, Wild Beast.
-Underworld Christmas(All Types): Spellbooks, Lawful Servants.
-ONILAND(All Types): Demonic, Masked Ghost.
-Shadow Island(Rabbit / Timepiece): Machine-type, Saber Servants.
Only farm what you need for the missions and clearing the shop, the material drops for these nodes are not very good. Save your apples for the upcoming Hunting Quests and Lottery.
Once you have cleared all missions, the Challenge Quest will unlock.
Challenge Quest - Alexander and Waver
Alexander(Rider) - 353,671 / 317,610/ 293,236
-Breaking the first bar increases his Attack and Critical Damage for 5 Turns.
-Breaking the last bar will grant Evasion(unremovable) for 3 turns and Critical Damage up for 5 Turns.
Lord El-Melloi II Waver (Caster)
-As long as Alexander is on the field, Waver has very high damage resistance. Waver will also buff his defense and decrease the defense of his attack for 3 turns every time he is attacked. (These buffs are unremovable and will only be gone once Alexander is dead).
-Will buff Alexander with Attack/Defense/Critical Damage Up randomly.
Beating the CQ:
-Clearing this CQ is rather simple. You can have a Single Target Assassin and Rider or just an Alter Ego along with support.
-Make sure to have Sure Hit or Invul to bypass Alexander's 3 turn Evade on his last bar.
-Avoid hitting Waver, focus your hits on Alexander and kill him quickly.
-Once Alexander is dead, Waver should be a fairly easy kill as his NP is more of a nuisance than a threat.