Well, that's useful. He knows it's not going to be as easy as this, but still, he runs at Sadde and starts the capture mantra, aiming to hit the sword with his staff.

Sadde expertly twirls the sword in his hand so it's actually pointing down and drives it towards himself—

—and Windy lets go, trying to push him away from the Sword—

—and Sadde quickly recovers his balance, gripping the sword the right way again.

Okay, that is not cool.

He studies the situation for inspiration, his eyes taking on a more calculating look. He should've done this much earlier, but apparently he was too busy rushing into things. Sadde's mum is over there, on the floor, wounded, possibly dying. Sadde is possessed by the Sword, and doesn't seem to have any ability to stop it. The Shadow can affect the movement of other objects by grabbing ahold of their shadows. He has the Jump available if he needs to quickly get away, and Windy is usually pretty all-around great for capturing cards, but pretty ineffective by herself here.

The Sword seems to have made Sadde into a really good swordsman. It can cut through Windy's tendrils, it's at least somewhat intelligent because it can combat repeated moves, and it can threaten to kill Sadde as a means of getting what it wants.

... And the Shadow almost worked to hold them still. It seems like it can inhabit shadows, so maybe it can inhabit his shadow, and help his attacks be more effective. "Shadow, help me get some more reach! Windy, come back here."

Shadow merges into Theo's shadow.

And Windy returns to Theo's side.

And the Sword uses this reprieve to press the attack again, using its supernatural speed to try to stab Theo.

Oh, fuck right off. Theo blurs out of the way of the attack with some less temperamental superspeed, movements efficiently taking him out of the path of danger, then directs some commands to his cards, hopefully softly enough that the Sword doesn't hear him. "Shadow, if you get a chance, disarm them," to Shadow, and then, "Windy, feint attacks at them and trip them at a good opportunity," to Windy.

He'll leave it up to Windy what counts as a 'good opportunity', but she's shown good intelligence so far, so that shouldn't be a problem. A surprise attack will work better than a barrage.

Turning to face Sadde again, Theo returns to the offensive, fighting for the most part not with supernatural speed, but much more quickly than the average human and with a strikingly efficient grace.

Sadde on the other hand is supernaturally fast and good at fencing. He dodges Theo's attacks with graceful ease, his empty eyes staring and drinking details of Theo's movements.

Windy continues attacking, trying to trip Sadde and pretty much failing—

—until Shadow intervenes, once again causing Sadde to stagger invisibly. But after that, it takes over the Sword's shadow and it—

—clatters to the ground.

Sadde stops. "Wh—what happened?" He looks around and—" Mum! Mum, mum, oh fuck, mum!"

Trap the Sword before it does anything. You can berate yourself later.

Still remaining focused on the weapon, Theo says the capture phrase, "Sword, I command you to return to your power confined," and then taps the Sword with his staff.

It returns to its card form.

And Sadde has called 999 and is getting an ambulance. She's been pierced through her belly, and is bleeding pretty badly.

Theo jogs over to Sadde and takes off his jacket, holding it against the wound. You're supposed to apply pressure, aren't you?

"Try Changing the wounds to be covered over, at least temporarily. We can undo it when the ambulance gets here," he suggests, voice somewhat off-key.

He looks at Theo and furrows his brows a bit, then shakes his head. "Right. Yes. Good idea. Change!"

It works. She breathes more easily and opens her eyes. "Sadde? Baby? Are you alright?"

"It probably isn't a good idea to let the Change become permanent. It might stop us from doing it again in the future," he says, not taking much effort to soften his words. "Sorry about that," he says to Sadde's mum.

"I understand."

"What happened? I blacked out and—What do we tell the doctors?"

"The Sword attacked her," he says vaguely. "We could say she was stabbed by a random lunatic. Or there might a confidentiality of treatment thing that she can lean on."

"The... Sword. Fuck it was me wasn't it? I found a brooch and—"

"Language!"