  The mimetic gravity theory is one of the interesting modified gravity
theories, which aims to unify the matter component of our universe within the
power of gravity. The mimetic-like theory can also be responsible for
primordial perturbations production, e.g., when the mimetic field is set to be
like a curvaton field, and the adiabatic perturbation can thus be generated
from the isocurvature perturbation via usual curvaton mechanism [1]. In the
original mimetic curvaton model, the parameter $\lambda$ was purely an
algebraic multiplier, lack of any perturbed dynamics. In the current paper, we
treat $\lambda$ as an auxiliary field, with its perturbation $\delta\lambda$
evolving alongside. We show that, with such a consideration, the adiabatic
perturbation can still be generated from the curvaton mechanism, and becomes
scale invariant with different field space configurations.
