Palladium Ore

Palladium Ore is a new Hardmode Ore that was introduced in the 1.2 patch.

If a player destroys a Demon Altar or Crimson Altar with a Pwnhammer after defeating the Wall of Flesh the world will generate either Palladium Ore or Cobalt Ore, alongside with the other Hardmode Ores like Orichalcum Ore or Mythril Ore and Titanium Ore or Adamantite Ore.