Cu Chulainn (Caster)

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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

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
✔ Rank Up 2 Chapter Completion:	Ascension: 4 Bond: 0

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

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

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• Analysis
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Overview

Individually Cu Caster has some great skills. His problems stem from the fact that they aren’t really synergistic or give him a clear identity. Rune Magic (and Primeval Magic after Rank Up) is a stellar steroid skill for critical damage dealer with an NP charge on top to boost a good cooldown. However, because Cu is a 3-Stars Caster with a mediocre attack, low-class modifier (0.9 for Caster), lack of means to absorb Critical Stars and has a BAAAQ deck, and he can’t make use of the critical damage buff component most of the time. Divine Protection from Arrows and Disengage are great in most circumstances as Defensive skills, but keeping Cu Caster alive for long doesn’t provide great benefits compared to other Casters like Medea or Hans. Last but not least he has a mediocre AoE NP with poor Overcharge effect, low damage and lack of steroids to improve its damage output.

All in all, he lacks a clear identity other than being a “tough to kill” Caster. Cu Caster should not be the go-to choice for any team lacking a Caster but can serve decently as a placeholder until the player can get someone better.

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

Similar to his Lancer counterpart, Divine Protection from Arrows is too useful and should be maxed first to reduce the cooldown. Afterward, Disengage is better for the short-term due to the small heal and debuff removal, but Rune Magic becomes a lot better after his Rank Up quest thanks to the NP charge effect. On the off chance that Cu Caster can crit, it also boosts his damage output decently.

Craft Essence Recommendation

Another Ending

Kaleidoscope

The Imaginary Element

Halloween Princess

Heaven's Feel

The Black Grail

GUDA-O

• Another Ending / Gudao: If you want to turn him into an Arts critical damage dealer, which can work provided your team can generate a lot of critical stars
• Kaleidoscope / Imaginary Element / Halloween Princess: Cu can fire off his Noble Phantasm pretty easily with these CE’s help and Primeval Rune, allowing for easier farming time
• Heaven's Feel / Black Grail: It is quite easy for Cu to fill his NP bar, so having these CEs will help his lackluster damage output

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Other Info

Parameters