: At E0, Acheron requires two additional Nihility teammates to maximize her damage multiplier (160%). E2 reduces this requirement to just one other Nihility unit, freeing up a slot for powerful Harmony supports like Robin or Sparkle .
: Her first Eidolon (E1) already provides an 18% Crit Rate boost; combined with the stat-heavy buffs from Harmony units allowed by E2, her damage ceiling increases exponentially. Strategic Value 2. Acheron (2)
: Acheron + Sparkle + Jiaoqiu (or Silver Wolf/Pela) + Aventurine . : At E0, Acheron requires two additional Nihility
: At the start of her turn, she automatically gains one stack of Slashed Dream and inflicts one stack of Crimson Knot on a random enemy. This significantly reduces her downtime between Ultimates. : At E0