Creates a magical shell around yourself to withdraw into, protecting you from attacks.. You gain 1 stack of 'Def Up'.'Def Down' causes the creature to receive -1 damage from weapon attack for each stack it has, stacking up to 6 times. All stacks are removed upon exiting combat. When a creature with 'Def Up' would receive stacks of 'Def Down', it will instead lose stacks of 'Def Up equal to the number of 'Def Down' stacks they would receive.