The animation of the Altar of the Occult.
The occult altar can be built in the altar space of the achievement gallery in a player-owned house. It requires 90 Construction to build and when built, it gives 3,445 experience. The player must have a hammer and a saw in their inventory to build it.
Players can switch their spellbook to one of the following: the Arceuus spellbook, Lunar spellbook, regular spellbook, or the Ancient Magicks. Other players can use the altar, provided they have the requirements to access those spellbooks.
In order to build the occult altar, players must right-click upgrade from the altar they have built, with the required materials dependent on the altar built. For example, upgrading the Ancient altar to the occult altar will require 1 lunar signet, 10,000 astral runes, 1 Arceuus signet, 5,000 blood runes, and 5,000 soul runes.
The crystal saw boost is applicable, making the minimum requirement level 82 Construction with a +5 boost from orange spicy stew.
Note: the rune pouch is not compatible with construction, ensure that your runes are outside of the pouch before attempting to boost/craft.
Requirements| Skill | Level | XP |
|---|
 Construction | 90 (b) | 3,445 |
| Members | | Ticks | 5 (3s) |
|---|
| Tools |   | Facilities | None |
|---|
Materials| Item | Quantity | Cost |
|---|
 | Ancient altar | 1 | N/A |
 | Blood rune | 5,000 | 1,950,000 |
 | Soul rune | 5,000 | 725,000 |
 | Astral rune | 10,000 | 1,550,000 |
 | Arceuus signet | 1 | N/A |
 | Lunar signet | 1 | 2 |
| Total Cost | 4,225,002 |
|---|
 | Occult altar | 1 | N/A |
Requirements| Skill | Level | XP |
|---|
| Construction | 90 (b) | 3,445 |
| Members | | Ticks | 5 (3s) |
|---|
| Tools | | Facilities | None |
|---|
Requirements| Skill | Level | XP |
|---|
| Construction | 90 (b) | 3,445 |
| Members | | Ticks | 5 (3s) |
|---|
| Tools | | Facilities | None |
|---|
Requirements| Skill | Level | XP |
|---|
| Construction | 90 (b) | 3,445 |
| Members | | Ticks | 5 (3s) |
|---|
| Tools | | Facilities | None |
|---|
Materials| Item | Quantity | Cost |
|---|
 | Limestone brick | 10 | 1,430 |
 | Magic stone | 1 | 980,260 |
 | Pharaoh's sceptre | 1 | 2,649,764 |
| Blood rune | 5,000 | 1,950,000 |
| Soul rune | 5,000 | 725,000 |
| Astral rune | 10,000 | 1,550,000 |
 | Ancient signet | 1 | N/A |
| Arceuus signet | 1 | N/A |
| Lunar signet | 1 | 2 |
| Total Cost | 7,856,456 |
|---|
| Occult altar | 1 | N/A |
- During development, the altar was called "Altar of the Gods". It was presumably changed as only the Ancient Magicks are associated with a god.
