You attempt to capture and redirect lightning. Make an Arcana check using your spellcasting ability, with a DC equal to half the lightning damage taken. On a failure, you gain resistance to lightning damage until the end of the turn, including against the triggering damage. On a success, you gain immunity to lightning damage until the end of the turn, including against the triggering damage. In addition, if the source of the damage was a spell, the spell’s area stops at you if it is a line, and you can reflect the spell back at the source as though it originated from you, using your spell save DC or spell attack modifier, turning the caster into the target.