Aerial Evacuation

As an additional cost to cast Aerial Evacuation, return a creature you control with flying to its owner's hand. If that creature is a Thopter, Aerial Evacuation costs {2} less to cast.
Return target creature you control to its owner's hand. If a Thopter was returned to its owner's hand in order to cast Aerial Evacuation, return up to 3 target creatures you control to their owners' hand(s).