One More Acheron Novaflare Idea

Basic ATK

• Now applies a stack

Skill:

• Applies 2 stacks

• Increased multiplier to 240%* on main target, 120%* on adjacent targets

Ultimate (multipliers can be changed if it's too much):

• Sequentially unleash "Rainblade" 3 times and "Stygian Resurge" 1 time, dealing Lightning DMG up to 465% of Acheron's ATK to one designated enemy target, as well as Lightning DMG up to 375% of Acheron's ATK to other targets. Each attack ignores DMG blocking mechanics from enemies.

"Rainblade": Deals Lightning DMG equal to 30% of Acheron's ATK to one designated enemy and removes up to 3 stacks of "Crimson Knot" from the target. When "Crimson Knot" is removed, immediately deals Lightning DMG equal to 20% of Acheron's ATK to all enemies. For every stack of "Crimson Knot" removed, this DMG Multiplier is additionally increased, up to a maximum of 80%.

"Stygian Resurge": Deals Lightning DMG equal to 135% of Acheron's ATK on all targets and remove all "Crimson Knots." Afterwards, additionally deals DMG for 6 times, each time dealing Lightning DMG equal to 30%* of Acheron's ATK to a single random enemy.

"Crimson Knot" cannot be applied to enemies during the Ultimate.

Talent:

• Maximum trigger count per ability is increased to 2 (Basically, if an ability is gonna apply 3 debuffs to X number of enemies, 2 of those debuffs now count for Acheron's stacks)

Technique:

• Increased multiplier to 280%*.

Traces:

~ Thunder Core:

• When the Ultimate's Rainblade hits enemy targets that have Crimson Knot, the DMG dealt by Acheron increases by 30%, stacking up to 3 time(s) and lasting for 3 turns. When Acheron holds all 3 stacks, her CRIT Rate increases by 18%. And when Stygian Resurge triggers, the additional DMG dealt prioritizes elite enemies.

~ Red Oni

• Starts battle with 8 Stacks

• Quadrivalent Ascendance stacks up to 6 times.

~ The Abyss

• 135% for 1 Nihilty, 180% for 2 Nihility.

Eidolons

~ E1

• The Talent's maximum trigger count per ability is increased to 3. When this unit's turn starts, gain 1 point of Slashed Dream and inflicts 1 stack of Crimson Knot on the enemy with the most Crimson Knot stacks.

~ E2

• The number of Nihility Characters required for the Trace "The Abyss" to achieve its highest possible effect is reduced to 1. Additionally, the highest possible effect for the Trace "The Abyss" is increased to 200%* of the DMG dealt, and all Nihility units' SPD including Acheron increases by 20%

~ E4

• When enemy targets enter combat, inflicts them with True Ultimate DMG Taken, additionally taking 1 instance of True DMG equal to 15%* of the original DMG for every 1 instance of Ultimate DMG the enemy takes.

~ E6

• Replace All-Type RES PEN buff to 20% AA every Acheron ULT.

• Increases maximum DMG multiplier when removing Crimson Knot to 100%.

The buff is meant to increase Acheron's ULT usage and ensure that full Nihility teams are still viable options compared to Harmony Nihility teams at E2, although I think it wasn't enough in hindsight. The free ULT in the start of battle is to activate the 18% CR cause why not lol. Probably a more underwhelming Novaflare idea but I did try to ground it a lot more.

As an additional fun fact, my original idea was to make Acheron's ULT do distributed DMG, but then I realized it'd make her a ST goddess unless some heavy restrictions were done, so yeah, not gonna do that lol.