The closest thing to this might be Ariana’s uncontrolled magic.
There’s no one in the seven books who uses raw magical energy without any specific intention as a purposeful weapon, but the closest thing we see to raw magic is the magic that explodes out of Ariana Dumbledore, after she was beaten by Muggles and stopped using it. She wasn’t trying to use any magic, so she wasn’t using any spells or having any intent on any specific outcome.
“She wouldn’t use magic, but she couldn’t get rid of it: it turned inwards and drove her mad, it exploded out of her when she couldn’t control it, and at times she was strange and dangerous. But mostly she was sweet, and scared, and harmless.”
- Harry Potter and the Deathly Hallows, Chapter 28 (The Missing Mirror)
It was her own ‘inner’ magic exploding out of her when it couldn’t stay in any longer.
“They’d have seen her as a serious threat to the International Statute of Secrecy, unbalanced like she was, with magic exploding out of her at moments when she couldn’t keep it in any longer.”
- Harry Potter and the Deathly Hallows, Chapter 28 (The Missing Mirror)
While it’s not something she was able to use as a weapon, this is the closest thing in the seven books to raw magical energy being used without spells or the intention of a certain result.
Obscurials, introduced in Fantastic Beasts, fit this even better.
In the new Fantastic Beasts and Where to Find Them movie, there’s a phenomenon called an Obscurus that’s a young wizard’s bottled up magical energy that bursts out of them and attacks.
“NEWT
I met one in Sudan three months ago. There used to be more of them but they still exist. Before wizards went underground, when we were still being hunted by Muggles, young wizards and witches sometimes tried to suppress their magic to avoid persecution. Instead of learning to harness or to control their powers, they developed what was called an Obscurus.
TINA
(off JACOB’S confusion)
It’s an unstable, uncontrollable dark force that busts out and – and attacks . . . and then vanishes . . .”
- Fantastic Beasts and Where to Find Them: The Original Screenplay
The Obscurus is actually described as being energy in the published screenplay.
“The Obscurus moves closer to GRAVES – we hear a scream from within the mass as its Dark energy bursts out once more, knocking GRAVES to the ground. The force sends a shockwave round the Square – NEWT dives behind a fallen car for cover.”
- Fantastic Beasts and Where to Find Them: The Original Screenplay
It’s also described by David Yates, the director, as being energy.
“While its nature and whereabouts baffle the top Aurors of MACUSA, Newt has a good idea that it is an Obscurus. He may also know how to deal with it – not that anyone is listening.
‘It’s a manifestation of Dark magic,’ explains Yates. ‘It’s really a wonderful idea that Jo came up with. When a young child is prohibited from developing their magic in a healthy, organic way, then this dark energy can develop, and the dark energy can suddenly get out of control and wreak havoc.”
- Inside the Magic: The Making of Fantastic Beasts and Where to Find Them
This same character who’s the Obscurial will be appearing in the sequel, and is even closer to being able to harness raw magical energy intentionally, seemingly without specific spells.
But not only is Credence in this film – definitely not dead – he’s more powerful and seething with rage. Or is that desperation? Credence is clearly learning to harness his intense powers… as we’ve seen in the previous trailer he seems to be able to control his Obscurus now.
- Everything we noticed from the Fantastic Beasts: The Crimes of Grindelwald Comic-Con trailer (Pottermore)
This will likely be very close to the wielding of raw magical energy, especially in the next movie.