Spirit Stones are socketable items that give a permanent bonus to weapons, armours, gloves, and shoes as long as you wear them. The stone grades run from +0 to +4, and each grade increases the bonus. You cannot put two copies of the same spirit stone into one item, and stones cannot be upgraded once obtained. Gloves use a variant called Demon Stones, which follow the same socket rules but give Sung Ma's will stats instead.
Socket capacity depends on item level. Items up to level 24 hold one spirit stone. Items from level 25 to 44 hold two. Everything above level 45 holds three. Inserting a stone is not guaranteed. When a stone breaks during insertion you get a Piece of Broken Stone in the slot instead. You can clear a broken slot by upgrading the item or by using a Stone Handbook.
Since version 25.2, shoes also accept spirit stones. You need to cut sockets first with a Black Diamond Drill. All shoes up to level 120 can hold two sockets, and champion-level shoes from level 1 can hold three.
Spirit Stones come from several sources. They drop from every Metin stone of level 25 and higher, with exceptions for most dungeons and for Metin Pung-Ma, Metin Ma-An, and Metin Tu-Young. The Spirit Stone Bundle and Boot Spirit Stone Pack are shop options. Two bosses drop high-grade stones directly: the Mighty Ice Witch drops spirit stones up to +4, and the Mysterious Monk drops both spirit and demon stones up to +4. You can also search for specific stones in the Looking Glass and Trading Glass under Upgrades then Spirit Stones, filtering by class rather than by name.
If you want to remove inserted stones later, two scrolls handle it differently. A Spirit Stone Scroll pulls out every spirit stone in the item and returns them to your inventory, but it leaves a broken stone mark on the slot. A Scroll of Correction removes only the last stone added and leaves no mark at all.
The bonuses split by equipment type:
Armour stones include Stone of Haste (movement speed, +5% to +30%), Stone of Magic (SP, +30 to +150), Stone of Vitality (HP, +50 to +300), Stone of Evasion (block chance, 1% to 8%), Stone of Ducking (arrow avoidance, 1% to 8%), Stone of Defence (+2 to +15 defence), and Anti-Magic Stone (magic penetration, +5% to +25%).
Weapon stones cover Stone of Monsters (monster damage, +1% to +8%), L. Stone of Monsters (+12% fixed), Stone of Cooldown (casting speed, +5% to +25%), Stone of Penetration (piercing hits, +1% to +8%), Stone of Deathblow (critical chance, +1% to +8%), and five class-specific stones against Warriors, Ninjas, Shamans, Suras, and Lycans (+5% to +25% each). Anti-Magic Stone also appears here for magic penetration.
Gloves use Demon Stone and Mighty Demon Stone, which grant Sung Ma's will in STR, VIT, RES, and INT. Demon Stone goes from +1 to +15 across grades, while Mighty Demon Stone doubles those values and adds a secondary number in parentheses that scales the same way.
Shoes stones include Stone of Bleeding (bleeding resistance, 1% to 8%), Stone of Elements (random element chance, 1% to 8%), Stone of Experience (EXP, 1% to 15%), Stone of the Moon (attack speed, 1% to 8%), Stone of Poison (poison resistance, 1% to 8%), Stone of Psyche (confusion chance, 0.1% to 0.8%), Stone of Resistance (RES, +1 to +8), and Stone of Vigour (VIT, +1 to +8).
A common approach is to put +4 stones in endgame equipment and +3 stones in starter pieces, then convert surplus +0 to +3 stones into Spirit Powder using a Magic Hammer for ore refining or Gaya crafting.
Source: https://en-wiki.metin2.gameforge.com/in ... rit_Stones