Thrall

A thrall of a type of familiar that can be used by a mage for various purposes, from minor ones like carrying objects to more important things like combat and healing. The type of thrall that a mage has varies on both their affinity and capability. Most mages will only be able to summon a minor thrall, while others with high affinity can summon major ones.
Not all thralls however are the same, and the size of a thrall doesn't translate to how weak or powerful it is.

Effect

Creates a creator dependant on the abilities of the master.

Side/Secondary Effects

The type of side effects that this spell gives off varies, a minor thrall is the result of a failed casting. However, putting to much Kai is put into the spell and summoning a major familiar can result in an over-saturation of the familiar, causing it to attack the caster until a name is given.

Source

Because a creator is created, protein imbued with Kai

Discovery

This spell dates back to the creation of magic, no one really knows exactly *when* it was discovered.