Cu Chulainn (Caster)

Table of Contents

• Status
• Analysis
• Profile

Servant Skills

Crit Dmg

Rune Spell A

Increase own Critical Strength (3 turns).
Increase own Debuff Resist (3 turns).

Show Info

Lvl	1	2	3	4	5	6	7	8	9	10
Crit Damage +	20%	23%	26%	29%	32%	35%	38%	41%	44%	50%
Debuff Res +	20%	23%	26%	29%	32%	35%	38%	41%	44%	50%
CD	7	7	7	7	7	6	6	6	6	5

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Available from the start

Crit Dmg

Primordial Rune (Cu Chulainn Caster)

Increase own Critical Strength (3 turns).
Increase own Debuff Resist (3 turns).
Increase own NP Gauge.

Show Info

Lvl	1	2	3	4	5	6	7	8	9	10
Crit Damage +	20%	23%	26%	29%	32%	35%	38%	41%	44%	50%
Debuff Res +	20%	23%	26%	29%	32%	35%	38%	41%	44%	50%
NP +	20%	21%	22%	23%	24%	25%	26%	27%	28%	30%
CD	7	7	7	7	7	6	6	6	6	5

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Replaces Rune Spell A after Rank Up Quest

Evade

Divine Protection from Arrows A

Apply Evade to self (3 times).
Increase own DEF (3 turns).

Show Info

Lvl	1	2	3	4	5	6	7	8	9	10
Defense +	9%	9.9%	10.8%	11.7%	12.6%	13.5%	14.4%	15.3%	16.2%	18%
CD	7	7	7	7	7	6	6	6	6	5

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Unlock after 1st Ascension

Debuff Clear

Disengage C

Remove own Debuffs.
Recover own HP.

Show Info

Lvl	1	2	3	4	5	6	7	8	9	10
Heal +	500	600	700	800	900	1000	1100	1200	1300	1500
CD	7	7	7	7	7	6	6	6	6	5

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Unlocks after 3rd Ascension

Debuff Clear

At the Lake EX

Remove own Debuffs.
Recover own HP.
Increase own ATK (3 turns).
Apply Delayed Buff [Yggdrasil Sacrifice] to self (1 turn):
- Apply Guts to self after 1 turn (1 time).
- Apply Delayed Buff [Activates Upon Guts Usage] (1 time):
-- When Guts is activated, increase own NP Gauge by 80% (1 time).
- Inflict Death on self after 1 turn [Demerit]. (Can trigger Guts)

Show Info

Lvl	1	2	3	4	5	6	7	8	9	10
Heal +	500	600	700	800	900	1000	1100	1200	1300	1500
ATK +	20%	21%	22%	23%	24%	25%	26%	27%	28%	30%
Revives with HP	1000	1200	1400	1600	1800	2000	2200	2400	2600	3000
CD	7	7	7	7	7	6	6	6	6	5

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Unlocks with Rank Up 3 after clearing Lostbelt No.6 Section 19 (Available 6/19/2023)

Append Skills

Special ATK

Extra Attack Boost

Increase own Extra Attack Card effectiveness.

Show Info

Lvl	1	2	3	4	5	6	7	8	9	10
Extra ATK Eff +	30%	32%	34%	36%	38%	40%	42%	44%	46%	50%

Start Np

Load Magical Energy

Begin battle with NP Gauge charged.

Show Info

Lvl	1	2	3	4	5	6	7	8	9	10
Start NP +	10%	11%	12%	13%	14%	15%	16%	17%	18%	20%

Dmg Up

Anti-Foreigner (ATK Up)

Deal extra Special ATK damage to [Foreigner] class enemies.

Show Info

Lvl	1	2	3	4	5	6	7	8	9	10
Special ATK +	20%	21%	22%	23%	24%	25%	26%	27%	28%	30%

Class Skills

Territory Creation B

Increase your Arts Card effectiveness by 8%.

Divinity B

Apply Damage Plus for yourself (Total Card Damage +175).

Noble Phantasm

Wicker Man B

Deal heavy damage to all enemies.

<Overcharge>

Decrease DEF for all enemies (3 turns).
Inflict Burn on all enemies (10 turns).

Show Info

Wicker Man

Flame Cage that Burns All

	Rank	Classification	Hit-Count
	B	Anti-Army	1

Effect	Deal heavy damage to all enemies.

Level	1	2	3	4	5
Damage +	300%	400%	450%	475%	500%

Overcharge Effect	Decrease DEF for all enemies (3 turns). Inflict Burn on all enemies (10 turns).

Charge	100%	200%	300%	400%	500%
Defense -	10%	15%	20%	25%	30%
Burn Damage +	300	600	900	1200	1500

Wicker Man (Upgrade 1) B+

Upgrade via Rank Up Quest 1

Deal heavy damage to all enemies.
Increase your Buster Card effectiveness by 20% (3 turns). (Activates First)

<Overcharge>

Decrease DEF for all enemies (3 turns).
Inflict Burn on all enemies (10 turns).

Show Info

Wicker Man (Upgrade 1)

Flame Cage that Burns All

	Rank	Classification	Hit-Count
	B+	Anti-Army	1

Effect	Deal heavy damage to all enemies. Increase your Buster Card effectiveness by 20% (3 turns). (Activates First)

Level	1	2	3	4	5
Damage +	400%	500%	550%	575%	600%
Buster +	20%	20%	20%	20%	20%

Overcharge Effect	Decrease DEF for all enemies (3 turns). Inflict Burn on all enemies (10 turns).

Charge	100%	200%	300%	400%	500%
Defense -	10%	15%	20%	25%	30%
Burn Damage +	300	600	900	1200	1500

Assorted Info

Attack / HP Growth

Stat Ratings

Interlude Quests

Quest	Requirements	Reward
✔ Interlude Chapter Completion: Septem	Ascension: 1 Bond: 2
✔ Rank Up 1 Chapter Completion: Chaldea Gate	Ascension: 4 Bond: 0	Skill 1
✔ Rank Up 2 Chapter Completion:	Ascension: 4 Bond: 0
✔ Lostbelt 6: Avalon le Fae - Section 19: Orkney Chapter Completion: Lostbelt 6: Avalon le Fae	Ascension: 4 Bond: 0	Skill 3

Ascension Materials

Stage	Cost	Materials
2	30,000	x4 Caster Piece
3	100,000	x8 Caster Piece x6 Seed of Yggdrasil
4	300,000	x4 Caster Monument x2 Claw of Chaos x7 Forbidden Page
Max	900,000	x8 Caster Monument x4 Claw of Chaos x8 Eternal Gear

Skill Enhancement Materials

Level	Cost	Materials
1 → 2	50,000	x4 Gem of Caster
2 → 3	100,000	x8 Gem of Caster
3 → 4	300,000	x4 Magic Gem of Caster
4 → 5	400,000	x8 Magic Gem of Caster x4 Forbidden Page
5 → 6	1,000,000	x4 Secret Gem of Caster x7 Forbidden Page
6 → 7	1,250,000	x8 Secret Gem of Caster x4 Seed of Yggdrasil
7 → 8	2,500,000	x4 Phoenix Feather x8 Seed of Yggdrasil
8 → 9	3,000,000	x10 Phoenix Feather x16 Eternal Gear
9 → 10	5,000,000	x1 Crystallized Lore

Append Skill Materials

Level	Cost	Materials
1 → 2	50000	x4 Gem of Caster
2 → 3	100000	x8 Gem of Caster
3 → 4	300000	x4 Magic Gem of Caster
4 → 5	400000	x8 Magic Gem of Caster x2 Spirit Root
5 → 6	1000000	x4 Secret Gem of Caster x3 Spirit Root
6 → 7	1250000	x8 Secret Gem of Caster x2 Heart of the Foreign God
7 → 8	2500000	x3 Heart of the Foreign God x2 Egg of Truth
8 → 9	3000000	x5 Egg of Truth x16 Divine Leyline Spiritron
9 → 10	5000000	x1 Crystallized Lore

Total Materials Required

Costume Dress Materials

Bond CE

Yggdrasil Tree

When equipped on Cu Chulainn (Caster),
Increase own NP damage by 30%.
30% Chance to regain 500 HP when attacking.

Table of Contents

• Status
• Analysis
• Profile

Overview

“Hey hey, if you make me too strong you won't be able to control me.”

For most of the story, and for new Masters, Cu Caster will seem like a vanilla and forgettable Servant. However, once a Master clears Lostbelt 6, he transforms into one of the premiere AoE Buster Damage Dealers in the game!

What truly transforms Cu from a vanilla Servant into a powerful one is his NP Charge skills, specifically Primordial Rune and At the Lake EX. Due to the massive delayed charge of At the Lake, and its short cooldown, it is possible to fully charge Cu every turn with room to spare given the right setup. In addition, he has rather decent damage in the right teams. Also, in common with other Cu counterparts, he is rather durable with Protection from Arrows A’s evasion and defense boosting capacities.

Cu does suffer some from his vanilla Servant status straight from launch. For one, his non-skill related NP gain is atrocious, leaving him much weaker until Masters clear Lostbelt 6. He also suffers from low natural attack, making him entirely reliant on supports and CEs for damage boosts. In addition, he cannot effectively use his Critical bonus due to having no real way of gaining Stars, making him NP-reliant.

Cu Caster is not particularly well used until after clearing Lostbelt 6, and even then only with the proper supports. But if a Master has the proper supports and has cleared the story to unlock his skill upgrades, Cu will transform into one of the best AoE Casters in the game.

Strengths

Weaknesses

Level Up Skill Recommendation

Skill	Priority
Rune Spell A Increase own Critical Strength (3 turns). Increase own Debuff Resist (3 turns). Show Info Lvl 1 2 3 4 5 6 7 8 9 10 Crit Damage + 20% 23% 26% 29% 32% 35% 38% 41% 44% 50% Debuff Res + 20% 23% 26% 29% 32% 35% 38% 41% 44% 50% CD 7 7 7 7 7 6 6 6 6 5
Divine Protection from Arrows A Apply Evade to self (3 times). Increase own DEF (3 turns). Show Info Lvl 1 2 3 4 5 6 7 8 9 10 Defense + 9% 9.9% 10.8% 11.7% 12.6% 13.5% 14.4% 15.3% 16.2% 18% CD 7 7 7 7 7 6 6 6 6 5
Disengage C Remove own Debuffs. Recover own HP. Show Info Lvl 1 2 3 4 5 6 7 8 9 10 Heal + 500 600 700 800 900 1000 1100 1200 1300 1500 CD 7 7 7 7 7 6 6 6 6 5

Cu’s kit at endgame revolves around At the Lake. By sacrificing himself after the turn and gaining 80% NP bar, he is capable of repeatedly using his Noble Phantasm. Primordial Rune is used in his initial charge, or a later one depending on the supports a Master is using. Protection from Arrow primarily gets used at the start of a battle just in case Cu does suffer damage, in which case it is vitally important as Cu will likely only have 3000 HP from Guts revives to live on for most of the battle.

• Rune Spell/Primordial Rune is one of Cu’s two charge, providing up to a 30% gauge charge. While its Debuff Resistance and Crit Damage bonuses are nice, they don’t often find use with him. Leveling this will depend entirely on if a Master has both Vitch and Oberon, or if they are lacking Oberon (or both). If a Master does not have both Servants, it should be leveled to max to take advantage of the 5-turn cooldown and full charge potential. If a Master has both, this skill can be effectively ignored in leveling by using both Koyanskaya charges turn 1, this skill turn 2, and Oberon’s charges turn 3. Either way, it should be leveled second.
• Protection from Arrows makes Cu much harder to kill. While it is a powerful skill with its three-time unlimited evade and Defense boosts, it has poor scaling (and primarily scales Defense). This skill should be leveled last and may be best ignored in leveling. 
• Disengage/At the Lake is Cu’s signature skill. It initially is just a debuff clear and a small heal, but after Lostbelt 6 it becomes a powerful charging skill. Cu will gain a powerful attack boost which stacks, along with a delayed debuff. At the end of the turn, he will die and be reborn with a self-sacrifice and Guts, giving him 80% NP charge. Its low 5-turn cooldown is what enables Cu to so effectively loop Buster damage. It should be raised to max to reach the 5-turn cooldown, and raised first.

Craft Essence Recommendation

The Black Grail

Heaven's Feel

Bitter and Sweet

Angel's Song

Kaleidoscope

The Imaginary Element

Dragon's Meridian

Cu’s true potential comes with The Black Grail CE. Without one, his damage will drop off dramatically, but he still will benefit more from those that boost NP Damage. In rare situations where 4 Noble Phantasms are needed, he could also use Starting NP Gauge CEs to get another one off, though at significantly less damage potential. As he does not require a charge, he also is a prime candidate for Event Bonus CEs.

• The Black Grail: Cu lives for this CE, using its 80% bonus to significantly ramp up his otherwise low damage. If Oberon is involved, this CE will have its strength multiplied, creating a true monster.
• Heaven’s Feel / Bitter and Sweet / Angel’s Song: The more NP damage Cu has, the better. Bitter and Sweet also comes with a bonus of two invincibility hits, helping him survive for longer. 
• Kaleidoscope / The Imaginary Element / Dragon’s Meridian: At the cost of damage, if Cu has a starting gauge he can potentially use his Noble Phantasm for a fourth turn in a row with the proper supports.
• Event CEs: As Cu is not reliant on starting charge or refund, he can often hold Event CEs so long as his damage is sufficient.

Gameplay Tips

Cu most effectively works in a team with Double Koyanskaya and The Black Grail CE. In wave 1, have Cu pop At the Lake and Primordial Rune, and use one of Koyanskaya’s NP charge/CD reductions after. In wave 2, pop the other Koyanskaya’s NP charge/CD reductions and have Cu recast At the Lake. In wave 3, have Cu pop Primordial Rune to finish the job. If a Master has an Oberon, they can use the Chaldea Combat Uniform to bring him in and massively boost Cu’s wave 3 damage with his third skill.

Table of Contents

• Status
• Analysis
• Profile

Other Info

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