Mordant had attempted to go to the elemental floor to absorb dark elemental mana. He wanted to replenish the mana he had used. In the matter of a day he had used so much mana that he felt he was not the same dragon. Unfortunately, when he tried to enter the mage tower he found that he was much more exhausted than he had expected.
The bonding of a spirit mark took a toll. It cost a great deal of the being's personal mana to perfectly meld on to their soul. The reason Mordant and Shade had bonded so well was the fact that Mordant had such a high affinity for darkness elemental mana. There was also the addition of Mordant's partner being part of Shade now.
