This holds the incredibly powerful Wraith Dragon and is the centerpiece of the Spectral Ruins. The Wraith Dragon is said to be as powerful as a mighty army. Can only be sent by itself on an attack.In order to level up your Dragon Altar you need to keep collecting the Anthropus Talismans as the number doubles for every level. Also when your dragon is ready to fight,
you will be required to have both the Blue Energy and the Talismans to summon it, you will also need the Remains of the Wraith Dragon , in other words simply to send it out. So, both those resources are a pre-requisite in order to summon the dragon EVERY TIME.You do not lose your dragons armor though.
In order to send the Wraith Dragon, you must summons it by clicking the "Summons" button that is found inside your Dragon's Keep. Then go to your target and select the dragon as you would the others.
If you summons the dragon, you do not have to send it at that time. The blue energy will regenerate even if you have your dragon summoned.
A Dark Portal is a building available in the Spectral Ruins. Dark Portals will consume Blue Energy and Souls to revive lost troops. Dark Portals allow you to resurrect different types of troops which have died in battle. Much like a Garrison, you will need a higher level Dark Portal to build more advanced troop types. Each unit revived will deduct the souls from your Mausoleum.
A Mausoleum is a building introduced in the Spectral Ruins. Souls recovered from battle are stored in the crypts of Mausoleums and can be revived in the Dark Portal. If your Mausoleums are full and you lose troops, you will not be able to collect any of those souls.
The Reaping Stones is a resource building introduced in the Spectral Ruins. By default, the Spectral Ruins start off with a production of 2,000 Blue Energy per hour and a capacity to store 500,000 Blue Energy. The construction of Reaping Stones increases the production rate and capacity to store Blue Energy. You do not need to collect this resource in Silos, as it is automatically added to your reserves. Research improves the amount of blue energy that is produced an hour.