Corrosive Mage (5e Feat)
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Corrosive Mage
Prerequisites: The ability to cast at least one spell
You have learned to imbue your magic with an abrasive nature that, over time, can erode away even the strongest resistances.
When you gain this feat, choose one of the following damage types: acid, cold, fire, lightning, or thunder. When you cause damage from the chosen type with a spell, the target loses resistance to that damage type, and its immunity becomes resistance, for the duration of the spell.
If the spell have the duration of instantaneous, the effect lasts until the end of your next turn.
You can select this feat multiple times. Each time you do so, you must choose a different damage type.
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