You are able to draw your innate magical ability to cast more powerful spells with a drawback. When casting Arcane Overload you can choose a different spell from your spell list with spell level equal to or less than your spellcasting modifier. The spell's casting time, components (excluding material), range, duration, & concentration are the same as the chosen spell. Immediately after the chosen spell is cast make a Constitution Saving Throw with a DC 12 + the chosen spell's level, on a failure the caster receives a 1 level of exhaustion. The next time you or an ally within 90 ft casts the chosen spell the magic fizzles out and fails, any material components that would be consumed are consumed.
Due to the intense nature of casting powerful spells at a lower level you can only cast this spell a number of times equal to your spellcasting modifier. When a spell that was chosen by Arcane Overload fizzles out you are able to cast Arcane Overload another time. Unpreparing and repreparing this spell does not reset the number of uses, Arcane Overload remembers.
Counterspell and Dispel Magic will treat the chosen spell as a 1st level spell.
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