Resonators Monsters Weapons Items
MF Tidal Residuum Development Materials A material used for Weapon & Resonator Ascension and Skill Upgrade.

A common formation resembling a storm-weathered boat, often found on Tacet Discords in Rinascita, which are said to be born of the Dark Tide and carry this Residuum since their formation.
Sources
Synthesis - Purification
Synthesis - Transposition
Drop: Tacet Discords influenced by the Dark Tide