I wont say how to do it. Supportticket has been made. You can still take damage through explosions, canonballs, fire/blunderbomb, Skelletonlord Earthquake Attack, Falldamage, Fire basicly Everything wich isnt caused by a Player/PvE-Entity. This Post existst so the community knows it exists. We saw 1 player in Arena accedently having this bug and we nearly reported him for hacking.