[HSR - 2.1 BETA] Acheron Changes

ATK: 679 -> 698
SPD: 104 -> 101

Skills:
Basic: Doesn't give a stack now.
Skill: Gives one stack instead of two.
Ultimate: Lightning DMG increased from 39% (78%) to 72% (144%) for Stygian Resurge.

Trace - Thunder Core
* Effect now lasts 3 turns.
* (Addition) When launching Stygian Resurge, additionally deal 6 hits, where each hit deals Lightning DMG equal to 25% of Acheron's ATK to a single random enemy. This DMG is considered Ultimate DMG.