Pwnhammer

The Pwnhammer is a hammer that is able to destroy Demon Altars, blessing the world with one of the hardmode ores. First destroyed Demon Altar blesses the world with Cobalt Ore, second with Mythril Ore and third with Adamantite Ore, next starting from the first, repeating the process generates more cobalt, mythril, and admantite respectively.

The hammer is always dropped by the Wall of Flesh. It is only possible to destroy Demon Altars in a map where the Wall of Flesh has been killed, otherwise the player loses half of their current health.

Trivia

 * The name is a reference to Super Mario Bros. X, a game Redigit has previously worked on.
 * It is the only hallowed item that cannot be crafted.