There are only three types of spirit beast in the spirit realm that can be summoned.
The first and most common ones are evil spirits.
Everyone knows that the spirit realm is filled to the brim with miasma, with most of its places heavily polluted with corruption and miasmic rot.
Any organism, be it monster or spirit, that lives there is a corrupted being, and these evil entities consist of the major population of the entire spirit realm.
Many of the evil spirits and monsters that Team Astra encountered inside the Spire of Ascension belonged to this group of spirits.
The main reason why being a 'Summoner' type awakener is considered a major gamble in this world is also because it's possible that you might end up summoning an evil entity that can cause trouble not only for yourself but for others too.
Oftentimes, many talented summoners end up summoning powerful monsters that end up going out of their control and refuse to sign contracts with them.
