As an action, you have resistance to acid damage for the duration.
You can target one additional willing creature that you can touch or see within 10 meters for each additional mana expended. The creatures must be within 5 meters of each other when you target them.
Immunity. You can expend 2 additional mana so you are immune to acid damage.
As a reaction, which you use when you take acid damage, you gain resistance to acid damage until the start of your next turn.
You can expend 1 additional mana to trigger the spell when a creature that you can touch or see within 10 meters takes acid damage. The creature gains the resistance instead.