Smoke Garden of Usurpation

is a smoke-based Weakening Magic spell.

Description
The users would open their grimoire in order to activate the spell. Once activated, the users could release smokes with poisonous properties which are deadly to anyone accept the users and those the users do not wish to harm.

The users are able to suppress the thickness of the smoke to a degree where it is invisible to see, thus decreases the awareness of the spell's activation. The spell takes time before it starts affecting the targets. Once the said targets have inhaled a considerable amount of the smoke, they would start losing their balance and fall to the ground. After losing control of their body, inhaling the smoke for a long period of time could lead to death.