Mizi is able to use his tier one semblance without strain for a maximum of three seconds at a time, requiring a three-second cool down between each use. This pattern can be repeated up to ten times before Mizi begins to sweat. This is for a single expulsion of a three meter by three meter cloud, usually expelled via his open palm. Basically, this equates to a minute of on/off usage before he begins to sweat, similar to say, very heavy barbell curls. If Mizi decides to forgo the cooldown in order to continue spewing soot clouds, then he is able to sustain only a full fifteen seconds before he begins to sweat. Likewise, if he chooses to utilize more of the surface area of his body to expel his clouds (for example, expelling two clouds at once out of both palms, or out of his back instead) then this reduces the existing timeframe for both sustained and controlled bursts by a magnitude of three (one second intervals with three second cooldowns, or five full seconds of expulsion). Nine full minutes is the total amount of time during a single instance for which Mizi is able to utilize his tier one semblance in the three-second controlled bursts for single expulsions before exhaustion is reached. The same timeframes can be applied to multiple or larger expulsions in its basic form. In total, Mizi is currently only able to utilize his semblance in this manner for a hard limit of 30 minutes a day before falling unconscious, requiring at least three hours of non-usage in-between if Mizi utilizes the full nine-minute controlled bursts of his semblance. Since he’s able to use the entire surface area of his body to expel his soot clouds, he also has the option of ‘engulfing’ himself in a single cloud utilizing the majority of his body, and this single instance of a one-second burst is equivalent to ten times the amount of energy required for a typical individual expulsion.
In regards to the second tier of his ability, the creation of aura-based constructs rather than amorphous clouds, Miziren is usually restricted to making a simplistic individual object, about the size of a spearhead, in a single instance of one second. Since it’s more of a strain to make constructs, the cooldown for this is much longer, currently on a 1:10 ratio. In a minute, Miziren is capable of making a maximum of six spearhead-sized items. Coincidentally, after six objects/one minute, Miziren begins to sweat. Complete exhaustion occurs after twice that amount of time. Miziren can opt to make a larger object instead, but the larger the object, the longer the amount of time necessary to create the object, which also quickens his exhaustion. So for instance, if he opts to create a large circular shield akin to a Spartan’s shield, this construct could very well take him a full six seconds, after which he’ll be sweating (not to mention he’ll just be standing there doing nothing for a full six seconds, leaving him vulnerable). Miziren is only able to utilize six seconds worth of constructs before he begins to sweat, with a hard cap of twelve seconds worth of constructs before exhaustion is reached in a single instance. Over the course of a day, a hard cap of twenty four seconds worth of constructs, equating to say, a conical spire the same height as Miziren with a base diameter of his height, is the total amount of time he can spend on constructs before falling unconscious. A minimum of four hours is required between both instances to regain the strength necessary to use a second instance.
Neither tier of his semblance works in vacuum either; if he uses both in a single instance, then both uses will weigh on him and count towards his exhaustion.