Conductor / one-man band

Casting this spell gives the caster the ability to induce several auditory or visual cantrip effects in parallel. Each cantrip has to be mapped onto a specific movement of the body, for example, left hand, right hand, foot, but also smaller limbs or movements are possible, like a blink, head nod, or finger snap. Every time the caster moves that body part in the designated way, the cantrip will come into effect. Thus, the spell can be used to 'conduct' cantrips like a conductor conducts an orchestra. The cantrip effects must be restricted to auditory or visual effects and cannot do damage to another living (or undead) being. 

The caster casting this spell on the 6th level can map and run four different cantrip effects concurrently. Cast at higher levels results in more effects open for mapping, with each increase in level resulting in one extra cantrip effect. Thus, a Bard using this spell on the 8th level can, for one hour, map six cantrip effects onto her body movements, creating a veritable 'one man band'. 

Using this spell to run cantrips in parallell, however, uses large amounts of mental energy. For each hour of active use of this spell, mental energy equivalent to eight hours will be depleted.