Cooldown Starts on Q Press | Duration Timer Starts after the Animation - Video - CC#5588
Energy Consumption is on Q Press - Video - CC#5588
Initial hit is Dynamic. DoT Snapshots. - Video 1 / Video 2 - CC#5588
DoT snapshots ATK Buffs and 2pc Noblesse but not Shenhe A1
DoT snapshots somewhere in the middle of Q animation, not on cast
Burst does not have enough iframes for explosive barrel immunity - Video - Mcpie#8672
Shenhe's Burst shred persists 2 seconds after burst ends - Video - CrazyWeke123#9720
Shenhe C2 extends the shred as well. - Video - TWICE#9958
Ascension Mechanics
A1: Deific Embrace
A1 is dynamic and changes as the character enters and exits the Shenhe Q Field - Video - CC#5588
A4: Spirit Communion Seal
A4 Buff Duration are Independent - Video - Trosalio#0420
Constellation Mechanics
C1: Clarity of Heart
The charges refreshes Shenhe stacks based on the latest type of Elemental Skill cast (tap/hold). You do not gain more stacks than the latest cast type cap, nor do you gain more damage per quill. Energy generation does not have a cooldown, so you can double cast consecutively to gain energy faster. - Video - Sitri#9504
The cooldowns of each skill stack, and it keeps track of the order used. - Video / Video 2 - TWICE#9958
In the first video we have hold E > hold E. There is a 15s CD that starts with the first hE, then a full 15s after that for the next skill use. In the second video we have hE > press, which shows the 15s CD > 10s CD.
C2: Centered Spirit
The Cryo damage bonus from Shenhe's A1 and crit damage buff from her C2 linger a bit after her burst animation ends. - Video - TWICE#9958
Finding:
Shenhe E consumes a Quill, however the first E cast does not give the initial E a C4 stack and instead counts towards the next E; C4 stacks are gained after the damage has been dealt and not before.
Finding:
These slow-motioned clips show that Shenhe's Gluteal Region does not exhibit oscillation after doing any of her attacks, dissimilar to Eula. Meanwhile, the Pectusculum Region manifests this phenomenon with almost all of her attacks with the exception of her N5, although this could be an error on my part with my visual analysis and/or camera positioning. Timestamps can be found in the video description.