Lorsqu’une unité proche attaque, la Meule à aiguiser a 4 % chances of showing sparks that hit a random monster and inflict zone damage. Damage is equivalent to 200 % damage to the Whetstone.

Chaque fois qu’une unité à côté de la Meule à aiguiser attaque, cette dernière fait apparaître une spark which inflicts 8 % of its damage to a single target. When units next to the Sharpening Whetstone merge or their merge rank increases, the damage inflicted by the sparks Sharpening Wheels increase from 25 %.

The sparks have 50 % chances of generating spark additional.

The damage inflicted by Sharpening Wheels on multiple targets is no longer reduced, inflicting 100 % damage to single targets.

Lorsqu’une Meule à aiguiser est fusionnée ou que son rang de fusion augmente, toutes les Meules à aiguiser overheatincreasing their damage by 10 % for 10 secondes. À chaque surchauffe, la durée de l’effet augmente de 2 seconds, while the damage bonus increases from 1.5 %.

When 3 Sharpening wheels are side by side, they overheat, augmentant les dégâts qu’elles infligent de 30 %.

Whetstone's critical chance increases by 1 % at each merge rank.