  In this work, the dynamical behaviors of a low-dimensional model, which
governs the interplay between a driver associated with pressure gradient and
relaxation of instability due to magnetic field perturbations, are
investigated. Besides that, two nonlinear controllers are constructed precisely
to shift the equilibria of the plasma model apart from each other. Simulation
results show that shifting the equilibria can change the spacing of chaotic
attractors, and subsequently break the butterfly wings into one or two
symmetric pair of coexisting chaotic attractors. Furthermore, stretching the
equilibria of the system apart enough from each other gives rise to degenerate
the butterfly wings into several periodic orbits. In addition, with appropriate
initial conditions, the complex multistability behaviors including the
coexistence of butterfly chaotic attractor with two point attractors, the
coexistence of transient transition chaos with completely quasi-periodic
behavior, and the coexistence of symmetric Hopf bifurcations are also observed.
