Rashomon: Ibaraki Boss - Enemy Skills and Description | Fate Grand Order Wiki

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Ibaraki

4 NP Charge Bars, Acts up to twice per turn

Skills
Day 1	Reduce all enemies’ Crit Damage for 3 turns.
Day 2	Inflicts Buff Block status to all enemies for 1 time.
Day 3	Seals all enemies’ NP for 1 turn.
Day 4	Reduces all enemies’ C Star generation rate for 3 turns.
Day 5	Reduces all enemies’ Healing Received for 3 turns.
Day 6	Reduces all enemies’ NP generation rate for 3 turns.
Day 7	Reduces all enemies’ defense for 3 turns.

NP	High Single Target Damage, Reduce Defense for 3 turns, Remove All Buffs

Guts will not work against this NP
Dodge and Invulnerability will nullify the NP’s damage, but will be removed after the NP.

Oni's Left Hand

3 NP Charge Bars, Acts once per turn

Skills
Day 1	Increase ATK of one ally for 3 turns. (Usually targets Self)
Day 2	Decrease DEF of one enemy for 3 turns.
Day 3	Increase ATK of one ally for 4 turns. (Usually targets Ibaraki)
Day 4	Decrease DEF of one enemy for 3 turns.
Day 5	Charge all allies' NP gauge upon death. Increase ATK of one ally for 3 turns.
Day 6	Cleanse debuffs for one ally.	Charge Ibaraki's NP gauge by 1.
Day 7	Increase Critical Chance to one ally for 3 turns.

NP	Single target damage + Stun (1 turn)

Oni's Right Hand

5 NP Charge Bars, Acts once per turn

Skills
Day 1	Increase ATK of one ally for 3 turns. (Usually targets Self)
Day 2	Decrease DEF of one enemy for 3 turns.
Day 3	Increase ATK of one ally for 4 turns. (Usually targets Ibaraki)
Day 4	Increase ATK of one ally for 3 turns.
Day 5	Charge all allies' NP gauge upon death. Increase ATK of one ally for 3 turns.
Day 6	Cleanse debuffs for one ally.	Decrease one enemy's NP gauge by 20%.
Day 7	Increase Critical Chance to one ally for 3 turns.

NP	AoE damage + Skill Seal (1 turn)

You CANNOT use any party revives in this fight (either Command Seals nor Saint Quartz) - the option will not be given.
Battle Ends when Ibaraki is defeated, if 15 turns pass, or if your party falls. Defeating the Oni Hands is optional (Oni Hands give additional drops upon defeat).
If your party falls, you still get to keep all drops, but the damage dealt to Ibaraki is NOT counted towards your Damage Points.
If you select the “Give Up” option during the quest, you do NOT keep any drops or Damage Points.

Chaldea Combat Uniform

The Order Change skill is very useful for switching in a Taunt Servant on Ibaraki’s NP turn. This lets the Taunt Servant absorb her ST NP to protect your support and damage Servants. Examples of Servants with a Taunt skill are: Mash, Leonidas, Georgios, Musashibou Benkei, EMIYA (Assassin), or Chevalier d'Eon.

Wave 1: 3 Drunk Citizen mobs

Gain as much NP as possible from the first wave of enemies. Do this by avoiding Buster card usage, always starting chains with Arts cards, and concentrating Brave chains on enemies with low health remaining.

Wave 2: Ibaraki + Left and Right Oni Hands

NONE of the enemies have a skill that can charge their NP gauge. Their NPs will not sneak out pre-emptively and you can plan accordingly.
Concentrate single target DPS on Ibaraki, including NPs.
Ibaraki will almost always use her skills once she drops beneath 50% HP, and again beneath 25% HP. You can plan your damage such that you trigger her skill use, since using a skill means she won't attack you for one of her two actions.
Once the Hands are about to use their NPs, use your own AoE NPs to kill the Oni Hands. The Right Oni Hand’s NP move is generally more dangerous (AoE damage, full party skill seal). The Left Oni Hand can stun a single party member, however, so it should also be destroyed before it uses its NP if possible. NOTE: On Day 7, use AoE NPs early to remove the Berserker-class Oni Hands at the beginning.
If bringing Zhuge Liang, strategically use Zhuge Liang’s NP to keep enemy NP gauges from filling all the way, while filling your own NP gauges. Favor Arts chains when possible on Zhuge Liang's NP turns.
On Ibaraki’s NP turn, if you cannot stun or otherwise postpone her NP, use Mystic Code: Chaldea Combat Uniform's Order Change to switch in your Taunt Servant to absorb the hit.