GS Companion
Millennium Veil

Millennium Veil

6★ Support Astral

Skill

40–46s CT - Increase ◯ Element allies' Arts by 35–50.

Numbers in a range are rolled when the equip is crafted.

Crafting

Fusion Type
Astral: a Astral Glyph raises the chance
Extra effects
0–2 at random: ATK UP, HP Recovery UP, Skill CT Speed UP, Break Power UP, CRI rate UP, Accuracy UP, Arts UP, BE Output UP, PHY DMG UP, MAG DMG UP
Passive
3 of the same Crest Fragment can add that Crest's effect

Other 6★ Support Fusion Equips

Angelic Wreath
6★ Support Energy

40–46s CT - For 12s, increase all allies' Arts by 3–4/s.

Treasure Case
6★ Support Energy

40–46s CT - For 12s, increase target's Arts by 9–12/s.

Native Polon
6★ Support Energy

40–46s CT - For 12s, increase ◯ Element allies' Arts by 4–5/s.

Asaikun Lantern
6★ Support Astral

40–46s CT - Increase target's Arts by 105–150.

Alternate Symbols
6★ Support Astral

40–46s CT - Increase all allies' Arts by 28–40.

Makina Flow
6★ Support Sense

40–46s CT - For 12s, increase all allies' Accuracy by 70–100%.

Ocean Lead
6★ Support Thanatos

40–46s CT - For 12s, increase all allies' CRI rate by 84–120%.

Venus Flower
6★ Support Buster

40–46s CT - For 12s, increase all allies' ◯ Element DMG by 70–100%.

Data from the Grand Crusade Guide by jeffers and .phex (Grand Summoners Official Discord).