4★ DEF 
Energy
Energy 40–46s CT - For 12s, increase all allies' PHY RES or MAG RES by 21–30%.
Leroque Shield
4★ DEF 
Vital Skill
40–46s CT - For 12s, increase allies' ◯ Element RES by 18–25%.
Numbers in a range are rolled when the equip is crafted.
Crafting
- Fusion Type
- Vital: a Vital 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, Status ailment RES UP
- Passive
- 3 of the same Crest Fragment can add that Crest's effect
Other 4★ DEF Fusion Equips
40–46s CT - For 12s, heal all allies' HP by 140–200/s.
Data from the Grand Crusade Guide by jeffers and .phex (Grand Summoners Official Discord).