Costs only charisma, gives 0 exp, 0 units and the moment you lose your 50 lives the battle is over and the kills you did are added to your total kills.

This type of event typically lasts a month and runs alongside other events. It is also a great way if you are lower levels to use charisma if you are close to leveling and do not want to waste it. Like if you went to bed and came back with 50 charisma left to level while having 200 charisma to spend.