How to obtain the Crafting Motif and Style Material:

Motif:

The Grim Harlequin motif book is available for purchase on the Crown Store during the Witches Festival event. Both the book and its chapters are unobtainable in-game.
• October 13th, 2016 to November 1st, 2016 – A bundle containing the full Grim Harlequin motif book + 50 Mimic Stones was priced at 2200 Crowns.

Style Material –
Grinstone:

This style material is only obtainable through deconstructing Grim Harlequin-styled gear, originally crafted using Crown Mimic Stones. Grintooth (raw material) is unobtainable.

 

Sets in this style:

Light:

[None]

Medium:

[None]

Heavy:

[None]

Variable:

[None]