hi need help plzz. can some one tell me how to make a trigger that when a unit enters a circle of power it teleports the entering unit to an arena and if another unit enters the circle it also teleports to the place and if there already 2 unit in the arena other unit cannot enter any more. and if 1 of those unit inside the arena dies the the killing unit gets a reward and get teleported back to the circle of power??????? sorry for my bad english realy need your help so tnx in advance