Cu Chulainn/Builds

Info

Builds

Lore

Role Summary

Name	Best Archetype(s)		PVE	PVP
	PVE	PVP		Offense	Defense
Cu Chulainn			D	F	F	-
Pros	Cheap fusible sweeper with Force Pierce in Purple, passable MAG stat, and can be easily fused through 4x4 fusions. No weaknesses is a lifesaver early on and gives him more flexibility in transfer skills. Very flexible kit. He can be either a Phys or a Force demon. Innate Savage Glee paired with Panel 4's accuracy and damage boost, as well as Gae Bulg hitting hard, makes him a great option for Phys Democalypse. A whopping 100% accuracy in his panel 4 (140% if you're attacking with maxed out Gae Bulg). Has a niche as a budget demon for BoS Deceit 14, as enemies there will only take damage from random Phys/Almighty attacks, which Gae Bulg happens to be.
Cons	High MP costs. Cannot use Mazandyne or Gae Bulg Turn 1 in PvP unless Panel 3. No Phys Pierce until panel 4. Low AGI and LUK means his physical accuracy is poor until Panel 4 is unlocked. No Single-Target attack means he will have trouble against Anti-Pierce and in PvP in general. Does nowhere near enough reliable damage to have a role in modern PvP.
Notes	He is mostly an early-game demon, and will fall off once you gain access to stronger Pierce sweepers like Baal and Anat. Low AGI makes him useable in Intimidating Stance teams. If run as a Phys attacker, transferring a better AOE Phys spell like Vorpal Blade isn't a bad idea, as he offers an impressive 100% physical accuracy in panel 4, innate Savage Glee, and another 20% crit rate from panel 1. With panels and Phys Amp / Butcher transferred on his other skill slot, whatever AOE Phys spell you transfer will hit hard as well as his own Gae Bulg. Buffed during the 6/5/25 Date Update.
Synergies	-

PvP Builds

Concentrate PvP Offense Slow Team Build
	Transferred Skills		Notes: Going second in PvP and wearing Divine Brands gives Cu Chulainn exactly enough MP to cast a 6 MP Concentrate on his first action and a 7 MP Mazandyne on his second. This build is also effective in PvE content as well. (If you don't have Force Amp, Force Boost is an acceptable substitute.)
	Concentrate	Force Amp
	Infused Mitama
	Ma 20 Vi 20
Brands
Divine/Life and Ward with MATK% primaries.
Target Stats
Lv. 50

Physical Sniper!
	Transferred Skills		Notes: With the current meta of very dodgy units, his 100% accuracy can come in real handy to counter said units. When fully paneled, Vorpal Blade will only cost 5 mp, making it very spammable. Gae Bulg will also cost 5 mp and could definitely work for pvp in cases where there arent many enemies left on the field as its 50 base power per hit and the 45% crit rate from Savage Glee and panel 1 means he will hit hard. Increasing his accuracy further with brands will make him even more overkill. Rebellion can be useful if youre up against stacked crit resistance.
	Vorpal Blade	Phys Amp
	Infused Mitama
	St 20 Vi 20 Lu 10
Brands
Life + Ward/Aim or with PATK% primaries.
Target Stats
Lv. 50