Ghost mode

From CC Wiki

Ghost mode is a feature of Minions. When minions are destroyed, they reappear as ghosts after a few seconds. They appear at their spawn area as a small, translucent form of their minion. In ghost mode, players cannot attack, have half of their original speed, and do not gain experience. Ghosts can go through other minions, towers, and walls. Additionally, ghosts cannot see enemy minions. The player's level is changed to seconds (lvl 12=12 sec, lvl 26=26 sec, etc.), and a respawn timer begins counting down. When the respawn time is up, ghosts respawn as normal minions. There is also a bug in ghost mode in which ghosts sometimes get stuck — they will rotate, but will not move. This issue can be prevented by not going into the tower/wall area.

Controversy

Ghost mode was introduced on April 1st, 2009. Many people thought it was a joke, but it was for real. In the beginning people didn't return to spawn point and instead respawned at the same point at which they died, but this was changed after heavy pressure, as many players were able to easily destroy towers by leaving their ghost next to one. Still, it is a feature disliked by many.