  We investigate velocity statistics of an impurity immersed in a uniform
granular fluid. An analytic solution of the inelastic Maxwell model shows that
a phase transition occurs in the cooling case. Light impurities have similar
velocity statistics as the fluid background, although their temperature is
generally different. Asymptotically, the temperature ratio increases with the
impurity mass, and it diverges at some critical mass. Impurities heavier than
this critical mass essentially scatter of a static fluid background. The
impurity velocity distribution is generally characterized by multiscaling
asymptotic behavior of its moments. Additionally, in the heavy impurity phase,
it consists of modified replicas of the initial distribution.
