J
J is a 6★ Beast Arcanist in Reverse: 1999. Below are the exact Insight materials needed to ascend them, plus other Beast Arcanists to build alongside.
Data updated: 2026-07-11
J — Review & Analysis
J is a Beast Afflatus unit centered on Reality DMG, but really a HYBRID of damage, team buffing and defensive support. His Skill 1 stacks 2 Burn on the enemy per hit, and for every Burn stack J carries the WHOLE team gains 1% extra damage for 2 rounds — the more Burn he holds, the harder everyone hits. Skill 2 shields the entire team (250% ATK) with a counter-attack, while his Ultimate hits all enemies for 350% Reality DMG and dumps his Burn onto them, adding 10% damage per overflowing stack. His clearest role: a sub-DPS who doubles as a damage buffer and team shield.
- Buffs the WHOLE team: each Burn stack J carries grants all allies +1% damage for 2 rounds (Skill 1) — he powers up the party while attacking.
- Strong team anchor: Skill 2 shields the entire team for up to 250% ATK and auto-counters when a shielded ally is hit.
- Scaling AoE burst: his Ultimate deals 350% Reality DMG, transfers his Burn to enemies and adds 10% damage per overflowing stack.
- Beast Afflatus counters Plant, dealing +30% damage against Plant enemies.
- Heavily reliant on Burn stacking: his damage buff, shield coefficient and Ultimate burst all scale with Burn, so he is weak early before stacks build up (a ramp-up dependency).
- Beast Afflatus is countered by Mineral — against Mineral enemies J is on the losing side of the counter cycle.
Since both J's damage buff and shield coefficient scale off ATK and Burn stacks, prioritize leveling Skill 2 (shield + counter) and his Ultimate first to lock in the anchor-plus-burst role, then Skill 1 as his Burn engine. For Psychubes, favor ATK / damage-oriented ones (they strengthen both his shield and his burst since both scale with ATK); if you run a more DPS-leaning build, consider adding crit to push his Reality damage higher.
Overview
Base Stats (max level)
| Base Stats (max level) | Lv.1 | Lv.30 | Insight 1 · Lv.40 | Insight 2 · Lv.50 | Insight 3 · Lv.60 |
|---|---|---|---|---|---|
| HP | 1,449 | 2,199 | 3,493 | 5,110 | 5,886 |
| ATK | 241 | 367 | 582 | 852 | 981 |
| Reality DEF | 129 | 196 | 312 | 456 | 526 |
| Mental DEF | 129 | 196 | 312 | 456 | 526 |
J — Skills & Incantations
Hardness Test
Incantation “Insight II: 1-target attack. Deals 450% Reality DMG. Inflicts 2 stacks of 【Burn】 on the target hit; for every stack of 【Burn】 on self, grant all allies DMG Dealt +1% for 2 rounds.”
Heat Treatment
Incantation “Insight II: Mass counter. Grants all allies a 【Shield】 with (J's ATK x250%) HP for 2 rounds, with each stack of 【Burn】 on self granting an additional 3% Shield Multiplier. After an ally holding a Shield is attacked, J ripostes with 【Tempering】.”
Leap Over Hyde Street!
Ultimate “Insight I: Mass attack. Deals 450% Reality DMG to all enemies. Right before attacking, inflict 【Burn】 on the targets equal to the number of 【Burn】 stacks on self. J does not gain 【Burn】 stacks from this attack, and for every excess 【Burn】 stack on the main target, this attack deals an additional 15% Reality DMG.”
Skill Quotes
“A chance to test it in a real fight.”
“A chance to test it in a real fight is hard to come by.”
“A chance to test it in a real fight is hard to come by. So, who wants to go first?”
“He was thrown into the fiery furnace of life.”
“He was thrown into the fiery furnace of life at a young age.”
“He was thrown into the fiery furnace of life at a young age, and to this day, he still feels little fear.”
“This isn't an action film, and there are no heroes.”
Insight Materials
Insight 1
Insight 2
Insight 3
Resonance Materials
All 14 Resonance levels
Recommended Psychubes
Where to Get
Teams with J
Isolde and Spathodea both pair Burn with Crit — igniting a target then critting the burning DoT window multiplies total damage. J adds a second Burn tag plus Shield/Riposte for frontline durability. Yenisei sustains. Isolde, J and Spathodea all require their Euphoria to reach this ceiling.
Teams →
