Failing You, Heavy in My Heart

ArcsGas (Type IV)Max 5★

Who Can Equip This Arc

This Arc's class only fits certain characters. Based on independent community sources, the Gas class currently includes:

Sakiri

List based on community sources, not necessarily the full current roster — a character absent here simply has no confirmed source yet, not necessarily an exclusion.

Spider Knowledge Collector

Grants the wearer 1 stack of Spider Knowledge when dealing damage with Basic Attacks, up to 8 stacks (up to 1 stack every 0.5s). All stacks are consumed when casting Ultimate. Increases the entire team's ATK by 2% for 1%s per stack consumed. Increases ATK by an additional 10 when 8 stacks are consumed.

Stars	Value 1	Value 2	Value 3
★	1%	2%	10
★★	1.2%	2.3%	10
★★★	1.3%	2.6%	10
★★★★	1.5%	2.9%	10
★★★★★	1.6%	3.2%	10

Values follow the official per-star curve from game data. Each column is one effect slot.

Why This Arc Is Strong (or Weak)

Support Arc: boosts team ATK on Ultimate cast, with buff strength based on stacks gained via Basic Attacks — the need to build stacks first slows down the damage rotation, which holds it back.

Upgrade Priority

Community tier: C

Spending heavy materials on a C-tier Arc you will likely replace in a few hours of play is a loss you can usually avoid — but a C-tier Arc that boosts raw ATK is still better than an empty slot in the meantime.