Wikia

vDemon Altar
	<img alt="Demon Altar" src="http://images1.wikia.nocookie.net/__cb20110824143561/terraria/images/f/f8/Demon_Altar.png" width="48" height="34" data-image-name="Demon Altar.png" data-image-key="Demon_Altar.png" />
Information
Type	Furniture
Sub-Type	Crafting Station
Rarity	Tier 0 (White)
Found In	The Corruption; Underground
Sell Value	No Value
Crafting
	This item cannot be crafted.

The Demon Altar 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:

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 some naturally generated blocks (from the underground or below) into the new ores and places one Pearlstone Block and Ebonstone Block randomly in the stone layer. By destroying more altars, your world will get more of the new ores, but every 3^rd 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.

NotesEdit

When an altar is broken and the world is blessed with the ore X, the quantity of spawned ore will be (Ore X spawned first time) / (Number of times world has been blessed with ore X). So, if the first Demon Altar spawned 10000 ore X, the second (Actually 4th because of ore cycling) will only spawn ~5000, the third ~3300, the fourth ~2500 and so on. Because of this, it may be wise to destroy only a few altars because while the ore-spawning is less effective, the world still converts random stone tiles into Ebonstone or Pearlstone, rendering both biomes less controllable. Also, it may be wise to always keep at least one altar in any given world to avoid losing its crafting recipes.
If the Demon Altar spawns on sand and you break the blocks under the sand, the Demon Altar can be destroyed without the Pwnhammer. However, your world will not be blessed by altars destroyed in this way.
The Demon Altar creates a small flicker of purplish brownish light that can be used to help locate them.
Demon Altars can sometimes spawn in the Ocean, but this is very unlikely.
Destroying a Demon Altar is directly associated with Wraiths Spawning.
Demon Altars do not spawn or respawn; there are a set number when the world is generated.
Demon Altars can not be picked up after their destruction, as they simply vanish.
Once you destroy all Demon Altars in a world, you will no longer be able to obtain any more of the Hard Mode ores or anything that requires a Demon Altar as a crafting station.

TriviaEdit

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: <Player 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.

BugsEdit

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.
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.

Update InfoEdit

v1.1

Can be destroyed when hardmode has been activated (By defeating the Wall of Flesh).
When smashed, will bless the player's world with Cobalt, Mythril and Adamantite Ore in a repeating cycle.
When smashed, has a chance of spawning 1+ Wraiths and create random Corruption or Hallowed points underground.

v1.0.0

Introduced.

GalleryEdit

Crafting Stations
Adamantite Forge	Alchemy Station	Bookcase	Cooking Pot
Demon Altar	Furnace	Hellforge	Iron Anvil
Keg	Loom	Mythril Anvil	Sawmill
Tinkerer's Workshop	Chair wi th Table	Work Bench