Summer fire

Summer Fire is the power of Summer. It is the opposite of Winter ice.

Description
Harry Dresden describes it as: "Pure flame filled me, the joyous heat of full summer, and I exalted in the sudden, overflowing life of it. It met the tiny spark of hope still glowing within me and the two multiplied." It gives him raw power to draw upon, fueling his spells, his weakened body, and for a time keeping the cold of Winter at bay.

Harry Dresden is the only person known to have wielded both Summer Fire and Winter ice.

Summer Knight
In Summer Knight the Summer Knight Ronald Reuel uses it to defend himself against the Winter Knight, Lloyd Slate. It did not save him however.

Proven Guilty
In Proven Guilty, Lily, the Summer Lady, gives Harry some to use in the form of a glowing butterfly. He draws upon it when he completely runs out of energy as he battled the Scarecrow.

Small Favor
In Small Favor the Summer Fire within Fix, the Summer Knight, prevents the snowflakes from falling on him. Each snowflake seems to find a way around him on its way to the ground, and though he only wears jeans and a green silk t-shirt, he is totally unaffected by the cold.

Cold Days
In Cold Days, Lily, distracted by Maeve's lies, hurls a huge wall of Summer Fire at Dresden]. He managed to protect himself and [[Fix from the flames with Winter ice. Lily, seeing that he survives, becames enraged, with Summer Fire replacing her eyes. After talking with Harry, she then launches a miniature star of Summer Fire directly at his head, too concentrated for him to block, only for Fix to stand up and deflect the bolt with his Faerie Sword, which is partially melted in the process.