Demon Altar

The  is a crafting station that can be found in Chasms in the Corruption, Underground and very rarely in water above ground or in Dungeons.

The Demon Altar is used to create the following items:
 * Slime Crown
 * Suspicious Looking Eye
 * Worm Food
 * Night's Edge



As of v1.1 it is possible to destroy these altars with the Pwnhammer dropped from the Wall of Flesh. Destroying them "blesses" your world with one of the three new ores: Cobalt Ore, Mythril Ore and Adamantite Ore (rotating in that order). Blessing your world turns any type of block that is usually generated with pre-Hardmode ore (from the underground or below) into the new ores and places one Pearlstone Block and Ebonstone Block randomly in the stone layer (this means that if you built a dirt/stone path to fight the Wall of Flesh, ore could spawn in it). By destroying more altars, your world will get more of the new ores, but every 3rd altar spawns fewer ores than before.

The only way to destroy a Demon Altar is to use the Pwnhammer or Hamdrax, and even then only if Hard Mode is active in the world you're attempting to break it in. If you try to destroy a Demon Altar with a hammer other than the Pwnhammer or Hamdrax, you will take damage approximately equal to half of your current health (affected by armor) and the altar will be unaffected. You cannot break Demon Altars before Hard Mode.

Trivia

 * It is possible to have 5 Demon Altars spawned directly below, and in the vicinity of, the spawn point.
 * It appears that all Demon Altars spawn within a very thin window of depth, only several blocks wide. Digging a horizontal tunnel through the map, albeit very time-consuming especially in large worlds (8400*2*3 blocks without holes), would allow one to find every demon altar.
 * In Alpha, Demon Altars were also used to make certain armors.
 * If you try to break a Demon Altar while you're in Pre-Hardmode or with a Molten Hamaxe or lower, you'll get damaged like said earlier, but if killed, the Death Message says only your name: 
 * It would appear that in 1.1 worlds, Demon Altars are spawned in amounts divisible by 3.
 * Sometimes, mostly in the corruption (maybe only in the corruption), a block may spawn stuck inside a demon altar (such as Demonite Ore or Ebonstone blocks. If this altar is hit with a hammer, it will disappear, the world will not be blessed, and you will be hurt. This can also happen with altars which are missing parts due to a graphical glitch.
 * Demon altar's are normally easier to find in the corruption due to a possible increased spawn rate and vast caves

Bugs

 * Will sometimes be invisible, or missing blocks of it, but can still be mined and will still give off a faint glow, even when invisible.
 * Since trying to break a Demon Altar with something different from Pwnhammer or Hamdrax damages the Player (damage is reduced by armor) constantly hitting it and damaging yourself will eventually kill you. The text displayed in the bottom left corner of the screen will only show the Player's name rather than saying what killed him.
 * When using Purification Powder on a Demon Altar, even outside of Hard Mode, the Demon Altar is destroyed.
 * Using the Ice Rod on a Demon altar will destroy it. Breaking it this way will create new ore in the world.
 * Demon Altars may spawn in midair.