-Title effects activated. Instant Death inflicted.
The red gem broke into million pieces after losing the vitality it once had. Even if the thing that the arrow hit was just an item without life and not an organism, it loses the durability it has possessed, leading to its "death." It looks like my understanding of that instant death ability is something I need to study more.
It was just pure luck that I managed to break the crystal since I am thinking it must be one of the sources of its power to move. And since the proc rate of the instant is very, very small, I didn't think much of it right when I hit the red gem. If it was destroyed, perhaps I might be able to reduce the danger the enemy possesses. But I didn't expect that the item I was looking for is currently being encased inside the red gem.