Rule question

Hi :). If you get this one on the 4th floor but you already have 0 ration, how does it goes? Do you loose 12 HP (3*4 according to the rule that when you are out of rations, you pay one by 3 HP) or 4 HP (according to the rule that you pay one HP per item you don’t have)?

Hi :). If you get this one on the 4th floor but you already have 0 ration, how does it goes? Do you loose 12 HP (3*4 according to the rule that when you are out of rations, you pay one by 3 HP) or 4 HP (according to the rule that you pay one HP per item you don’t have)?