The 黑曜石玫瑰 is an 配饰 that reduces 熔岩's base damage from 80 to 50. It has a 2% (1/50) chance to drop from 火焰小鬼s in 地狱.
- More effective and easily accessible means of surviving contact with lava, such as 黑曜石皮药水s and 熔岩护身符s, become available during or even before the stage of progression where a player could reasonably begin looking for an Obsidian Rose. Combined with how rarely it appears, and the fact that all its alternatives prevent lava damage outright, an Obsidian Rose has usually outlived its usefulness before it is even found.
- If the player has an Obsidian Rose and 100 / 66 defense, they will only take one damage from lava. The 着火了！ debuff from lava will still deal full damage, however.