Frederik_Tree Aus der Minecraft Wiki (Englisch):
It is a common misconception that enough TNT will destroy obsidian. Even though its explosion resistance rating is finite, additional TNT or other explosives will have no more effect on an individual block than only one (it would take 71.25 times the explosive power of TNT to destroy a block of obsidian). It is possible to hack or use /summon an explosion strong enough to destroy obsidian, but no such explosion appears naturally.
Obsidian kann also nicht gesprengt werden. Blaue Wither Schädel können es zwar theoretisch, diese können auf Halfminer aber keine Blöcke sprengen.
