Including edge OB, single triangle, square threshing, spoon threshing, circular threshing, transfer GANK and so on.
Edge OB: When using the assassin hero, don't stand in front of the team battle from the beginning, or even appear in the opponent's field of vision. Instead, we should observe from the side (OB), wait for the opponent to release a wave of skills or the formation is out of line, then cut in and kill the crispy skin on the other side, then leave the battlefield to continue OB, and then cut in after the skills cool down, so it is called "edge OB" or "OB play".