Thanos still has the other rocks. Carol is smiling at hers, maybe even talking to it, but has no idea how to use it and they don't know how long that learning curve will take.
Thanos's first reaction is to try to use Space to take Power back. This works for a moment, but before he can snap his fingers it zooms away toward Carol again, and by that time the physical combatants are charging, Huan with his teeth bared and Loki and Thor both leveling weapons from opposite directions.
Loki whispers, occasionally, it doesn't matter where she's audible from if it's anywhere and if he can't keep taking the Power stone back from Carol that's a major step forward -
Lævateinn dissolves in her hands after glancing off his shoulder, and she hopes that's fixable, she'll miss it, but she has a backup expansible glaive; she lets Thor take the next opening while she draws it.
Carol gets the Power stone back for the third time in a row and kisses it and zaps Thanos with a beam of eye-searing light; for a moment nobody, even Thanos, can see without spots in their vision. Loki gives everybody on her side illusion sunglasses.
At some point Thanos has broken Nebula's neck - he's holding Loki by the throat, now - he notices the illusions, and they start crumpling under the force of the reality stone - Thor is rewound to the beginning of the fight - Carol tries another blast, but Thanos isn't there any more -
"Come on," Loki whispers with the last of her breath - she doesn't have to breathe, either in general or to make sound, but Thanos doesn't have to know that yet - "Come on, come to me -"
The Space stone is unmoved.
Thanos is a little distracted between Loki failing to be crushed in his grip and occasional potshots from Carol who just keeps getting the Power stone back however often he takes it and Thor and Huan nipping his heels -