Swap
From Final Fantasy Wiki
Swap is a White Magic spell in Final Fantasy II. It switches the user's HP and MP with the target's. However, the HP and MP exchange cannot cause a value to exceed its maximum amount. For example, if the player were to use Swap on an enemy with 30 HP, its HP would not exceed 30 no matter how much HP the caster had. Using Swap, a character is able to level up their HP and MP quickly against weaker enemies with lower HP and MP scores.
