Adrian immediately thought of something that might be related to the creation of Summoning Magic. In essence, Summoning Magic is a type of covenant between two souls as well. The spells that are the base for Summoning Magic are Summon and Seal.
The Summon spell calls forth the being that is connected to you via their soul. It is also a powerful magic spell that basically tears apart of your soul and merges it with the being that you have a covenant with. After all, becoming a soulbound monster meant that both of you share the same ideals and vision. It could be that both have a bond or that both just want to become stronger.
