Rumbling Marni's Stone (Blade)

- Description: Mad Scientist Marni's invention. A Marni's Stone made for a special purpose, yet remains indistinguishable from other stones to all but Marni himself. Records all tremors from a hunted monster's sample. Once the stone is filled, you can exchange it through Marni. Target: Defeat Thornwood Forest monsters x150 ※ Samples can only be collected if you make the last hit.