Igneous Obsidian

Igneous Obsidian (Korean: 타오르는 흑요석, taoleuneun heug-yoseog, "Blazing Obsidian") is an Epic Treasure that was released alongside Picky Pyro-tiger in the first half of The Longing of the Rising Flames update. It turns obstacles into obsidian, which then explode and create Obsidian Shard Jellies.

Story
''An obsidian was found in between the cracks of hardened lava. It starts to glow, burning up in red... Has it been embodying lava all this time...?''

Trivia

 * Igneous Obsidian is the first Treasure to be released alongside a Pet, as opposed to a Cookie or a Magic Candy.
 * Igneous Obsidian's skill bears some resemblance to how Golden Cheese Pickaxe operates.