Fischl
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Skill Mechanics

Fischl E ICD

By: muakasan#2792 Added: 04/05/2021
Finding:
Determining Fischl's Elemental skill's ICD. Fischl's E (Oz) will apply electro every 4 hits or when a timer reaches 5 seconds after the first electro application. When the 5 second timer reaches zero, the oz's next hit will apply electro regardless of the hit counter. When the timer reaches 0 the hit counter will be reset and a new 5 sec timer will begin. This is very similar to auto attack ICDs, except instead of 3 auto attacks it is 4 oz hits, and instead of a 2.5 sec timer, it is a 5 sec timer.
Evidence:
Significance: A better understanding of ICDs.

Resummoning Oz while he's still active counts as using an elemental skill

By: Peekays#2722 Added: 07/17/2021 Discussion
Finding/Bug: Both the summoning and re-summoning of Oz with E count as using an elemental skill. For example, they both trigger the 4pc heart of depth effect.
Evidence: Video Video
Unbuffed: 566 + 142
After e: 735
After e refreshed, oz now expired: 735 + 185
After HoD buff is gone: 566 + 142
Significance: Potentially relevant data for Fischl main dps calcs.

Burst Mechanics

Fischl Ult Has I-Frames

By: !K#3689 Added: 5/6/2021 Discussion
Finding: Fischl ult has a tiny window that you can use to iframe through attacks.
Significance: Fischl has I-Frames on her ult, contrary to the TCL's previous claim that there were none.

Oz Summoned From Ult Snapshots Fischl's Stats When Swapped Out

By: Trosalio#0420 Added: 5/7/2020 Discussion
Theory: When Fischl casts Midnight Phantasmagoria and then gets swapped out, she will leave Oz behind, who will take a snapshot of Fischl's stats the moment she leaves the field.
Evidence: I started off by casting Fischl skill to show his current dmg which was 665. Then at 00:08, I used Fischl burst and swapped off when she lost the atk buff. As you can see, Oz dmg was also 665. Video For the second video, I used Fischl burst, but swapped off before she lost the atk buff. This time, Oz dmg was 1791 which was higher than his previously expected skill dmg. Video
Significance: Not only do you need to be careful about Bennett's atk buff tick interval, but also need to be careful not to let atk buff ran out before swapping out of Fischl.

Fischl's A4 Targetting

By: Aluminum#5462 Added: 5/29/2021 Discussion
Theory: Fischl's A4 Talent targets the closest enemy to the character, not necessarily the enemy on whom a reaction was triggered
Evidence: Video
Significance: This is something to keep in mind while managing enemy aura

Ascension Mechanics

A1: Stellar Predator

Fischl A1 Can Proc Prototype Crescent Passive

By: Charliex3000#9403 Added: 03/25/2021
Finding: Fischl A1 can proc prototype crescent passive on humanoids (hitbox with weakpoint on top)
Evidence:
  • Hilichurl
  • Ruin Guard - usually it doesn't proc Prototype Crescent, but when you hit Oz in the head, it works.
Significance: Prototype Crescent rises up in weapon choice for a A1 charged shot focused Fischl build. Additionally, you can see that I need to aim to the side of Oz, because he doesn't count as a "target" so there is a parallax effect for aiming, requiring me to aim to the side to hit him.

A4: Undone Be Thy Sinful Hex

Fischl A4 Proc Rate

By: Terrapin#8603 Added: 4/26/2021 Discussion
Finding:
Fischl's a4 proc rate appears to be less than 1 second, and instead seems to be 0.5s.
Evidence:
[Video] Appears to be about 0.5s-0.6s cooldown (0.5s if judging from the first frame of each damage number appearing, 0.6s if judging from the first frame of the lightning bolt animation)
[\Video] Using swirl + electro-charged to proc Fischl's A4, there appears to be a 0.5s cooldown (judging from the first frame of the lightning bolt animation)
Significance:
Team building around enabling Fischl's damage output

Fischl A4 Range tests

By: Aluminum#5462 Added: 04/26/2021 Discussion
Theory: Fischl's A4 has a range centered around the triggering character, which is generally greater for characters with ranged attacks. When an attack at the edge of the range triggers an electro-related reaction Fischl's A4 can fail to trigger. Deployables are factored in to the range as well, such as Beidou Q or Oz himself.
Evidence: This was tested with Hu Tao's charge attack, the end of Noelle's greatsword swings under burst, and the end of Xiangling's Charge attack infused by Chongyun. A demonstration of how the range is variable by character is shown using Diluc's burst.
Significance: An understanding of the underlying mechanics of Fischl's A4 passive and possibly future similar effects

Constellation Mechanics

C4: Her Pilgrimage of Bleak

Fischl C4 Damage is Burst Damage

By: Sed#0013 Added: 07/03/2021 Discussion
Finding/Bug: Fischl's Constellation 4 damage is considered burst damage.
Evidence: Video
Significance: Fischl C4 can benefit from Burst Damage multipliers

C6: Evernight Raven

Fischl A4 And C6 Snapshot Mechanics

By: sigurd#3854 Added: 1/21/2022 Discussion
Finding: Fischl's A4 and C6 uses snapshotted stats on Oz cast and recast.
Evidence:
Significance: Helps with accurate calculations as well as rotation crafting.

C6 Fischl Multi-Hit

By: Aluminum#5462 Added: 07/29/2021 Discussion
Finding/Bug: Fischl's C6's joint attack does not proc multiple times on multi-hit attacks, but rather procs on attack startup like XQ rainswords.
Significance: Fairly important to calcs involving C6 Fischl

How various aspects of Fischl's damage are calculated

By: itsjaeYOU#2868 Added: 07/05/2021 Discussion
Finding:
  • C1 "22%" is calculated as a Talent Skill % (MV)
  • C1 is physical damage
  • C1 does not benefit from stringless
  • C1 can crit
  • C2 "200%" is added to your skill (E) talent% (MV)
  • The Stringless benefits E and Oz' normals
  • The Stringless passive is added to DMG% in damage formula
  • Alley Hunter benefits E and Oz' normals
  • Alley Hunter passive is added to DMG% in damage formula
  • A4 is calculated as a MV
  • A4 benefits from stringless passive
  • A4 can crit
  • C4 is calculated as a separate instance of damage
  • C4 "222%" is calculated as MV
  • C4 benefits from stringless
  • C4 can crit
  • C4 and Q have separate crit rolls
  • C4 damage occurs before Q (higher priority)
  • C6 is calculated as MV
  • C6 benefits from stringless
  • C6 can crit
Evidence:
Significance: Better understanding of how Fischl's Ascensions and Constellations are calculated.

Synergies/Interactions

Can Sucrose's Normal Attacks (and by extension, Swirl reactions) trigger Fischl's Lightning Smite?

Submitted by: Cola#6861
I was asked this question on reddit and thought it should be the case since Sucrose' basic attacks are anemo which will swirl the electro debuff on the enemy.
Upon testing, as expected: it works, and yes Lightning Smite also crits!
Evidence:
Video
Significance:
One more reason to get Sucrose out in the field more often, at least for this use case.

Fischl's C6 Procs 4pc Millelith

By: jdeeyu#9927 Added: 6/8/2021
Finding: Fischl's C6 counts as a proc for 4ToM's effect
Evidence: Video
In the video it shows Fischl's stats and equipment before proccing 4ToM, Oz is then summoned outside of his normal E range and doesn't do damage therefore not proccing 4ToM and C6 is used. As can be seen C6 does count as a proc for 4ToM. Oz is resummoned near the Ruin guard at the end to show that the damage that came from the first one was indeed from C6 and not from Oz's E shot (~2k damage on E, ~350 damage on C6 proc)
Significance: Normally not useful since Oz even without C6 should be enough to have 100% uptime on 4ToM while he's out. But there could be cases where Oz misses from some reason (maybe an obstacle) then C6 can cover for that and make 4ToM a bit more consistent. C6's Range is also larger than Oz's E shots so there could be fringe cases where Oz is out of range but you can still proc 4ToM using her C6.

Oz and Baron Bunny

By: Ramen#5124, Riverta#5461 Added: 7/01/2021 Discussion
Finding/Bug: Oz is able to target Baron Bunny if Fischl’s Ascension 1 passive, Stellar Predator is triggered, despite having no enemies nearby. The passive may or may not deliver a Thundering Retribution onto the Baron Bunny as shown in the two videos below.
Evidence:
Significance: The authors are unsure if it is due to the spaghetti code of the game or intended design, but this is a fun little interaction that they have discovered.

Fischl A1 Amos Interaction

By: jstern25#1399 Added: 08/01/2021 Discussion
Finding: Fischl A1 Amos buff is based on the distance between Oz and enemy, not fischl and Oz.
Evidence: Video
Significance: Social distancing

C6 Fischl doesn't fire with C6 Yoi

By: EdisonsMathsClub#6469 Added: 08/22/2021 Discussion
Finding: C6 Fischl's joint attacks will not fire a joint attack with C6 Yoimiya's extra kindling arrows
Evidence: Video 1 and Video 2 to help break it down (credits to Xethrion to help provide footage of C6 Yoimiya and C6 Fischl)
Step 1. Fire Yoimiya's N1, see how many Fischl's C6 numbers appears Step 2. Fire Yoimiya's N1 but ensure C6 activates, see how many Fischl's C6 numbers appears
Significance: C6 Yoimiya does not turn Oz into a true mini gun, and the rate of C6 Fischl's joint attacks is limited by Yoimiya's innate Normal string combo.
Last modified 5d ago