"Convert MP to HP increases your maximum HP by a certain amount at the cost of an equal amount of maximum MP. The key difference between this effect and equipment with MP -x HP +x is that the word 'converts' indicates the effect will not work if you have zero MP to begin with (i.e. Warriors, Monks, and other jobs with a zero MP total."@en . "Convert MP to HP"@en . "Convert MP to HP increases your maximum HP by a certain amount at the cost of an equal amount of maximum MP. The key difference between this effect and equipment with MP -x HP +x is that the word 'converts' indicates the effect will not work if you have zero MP to begin with (i.e. Warriors, Monks, and other jobs with a zero MP total."@en . . .