Trigger M1 Clarifications
M1 is added as an additional +20% Stun and Non-Stun DMG Multiplier. It is not multiplicative. (35% + 20%).

As a result of using a new Multiplier for the outside of Stun variant, it will no longer be diluted by sources of enemy DMG Reduction (before they shared the same stat).

Trigger Stun DMG Multiplier Clarifications v1.6.1
This ability has been changed to use a new stat, quite literally just "Stun DMG Multiplier outside of Stun". Additionally, this value is now (at Core F) 35% both inside and outside of Stun.
1.35x outside of Stun
1.5+0.35 = 1.85x inside of Stun (assuming no Qingyi or different Base Stun DMG Multiplier value)

Hakush.in 1.2.4 update for ZZZ
Caesar: 1.2.0 / 1.2.1 / 1.2.2 / 1.2.3 / 1.2.4 (Current)
Burnice: 1.2.0 / 1.2.1 / 1.2.2 / 1.2.3 / 1.2.4 (Current)

Caesar now consume 1 parry point to use hold Basic atk