You can use a mockery on immunity. Supports giving immunity are benevolence or have not fallen. Use the resurrection of the church passivity, prestige or blockbuster.
There is also a specific method through bb3 Annie, then she will remove the death from herself and betray the enemy, after 3 seconds if he stands on a corpse, he will die. But do not forget that if it is a corpse from the enemy's team, then he will rise again!