From Granblue Fantasy Wiki
|This character has multiple versions.|
[Thunder in the Dark Night]
RaceOfficially called "Type" in-game.
SpecialtyThis character gains 20% more ATK from weapons of this type in your grid.
GenderGender is a character attribute used for game mechanics. A character's lore, appearance, and other factors do not affect this attribute.
|Voice Actor||Kazuya Nakai|
|How to Recruit|
|Halloween Premium Draw|
|Cloaked all in black, he roams the dark, autumnal nights. The thunder of his weapon echoes through the shadows, crying out to the crimson moon. In this journey he continues to search for his serenity in the din.|
|Dead-End Shot||Massive Earth damage to one enemy. Consumes allstacks.|
|Flamek Thunder|| 7 turns
|20 sec|| Lvl 1
⇧ Lvl 55This skill is enhanced at level 55.
| Earth damage to all enemies (Damage cap: ~460,000). Slight chance to inflict
. Gain 2 stacks. |
Level 55: Damage increased to 250-350%.
|Tonight I Fly|| 5 turns
|-|| Lvl 1
⇧ Lvl 75This skill is enhanced at level 75.
|250%-350% damage to one enemy (Damage cap: ~400,000). Consumes 3stacks.|
|Wasted Earth||8 turns||3 turns|| Lvl 45
||All allies gainand . Gain 1 stack.|
|Flamek Trigger||1|| Gain 2
stacks after each turn.|
If Eustace reaches 10 stacks, self-inflict , preventing any action until his stacks are removed. Lose all stacks when Eustace is damaged while .
|Lupine Lightning||1|| Increases
ATKNormal modifier, Charge Attack damage, and Charge Attack damage cap based on stacks.
|Extended Mastery Support Skill||EMP||Boost to resistance against charge-attack-sealing debuffs|
- Eustace (Halloween) gains buffs based on the number of  stacks and are as follows:
ATK UpNormal modifier
|C.A. DMG Up||C.A. DMG Cap Up|
|1-8||For every stack +3%||For every stack +20%||For every stack +5%|
9-109 and 10 stacks have the same buff values
+50%After the 8/15 balance patch
Extended Mastery Support Skill
|Rank||C.A. Seal Resistance|
|Uncap 1★||Uncap 2★||Uncap 3★||Uncap 4★|