Casts 'Stonehard Skin', changing your skin into a solid shell.

For 3 minutes, consumes 25% of the caster's HP to create a protective shield with the same amount of HP consumed.
Increases DEF and MDEF by (Job Level * Rune Mastery skill Level)/4.
Has a chance to destroy weapons of attackers when receiving melee physical attacks.
If the attacker is a monster, it reduces 25% ATK for 10 seconds.

The protective shield will disappear when its HP goes to zero.
This skill has no effect on Boss monsters.

(This item has a maximum carry capacity of 60.)

[iRO Description]
By projecting the magical power of rune stone onto his own skin, he turns his HP into a hard, stone-shelled skin at some cost.
During duration, increases physical and magical armor, adds a chance to destory enemy's weapon who deals melee physical damage to a player.
Effect disappears when duration is over, or stone-shelled skin HP becomes 0.
In the case of monsters, the attack power of the monster decreases. However, this effect does not work for boss monsters.