"Expelliarmus!" The spells is past his lips the moment Regulus goes for his wand, but the slighter boy had always been fast on the draw; Remus' spell hits just as Regulus had made to toss the wand aside, doubling the momentum with a loud BANG! and causing Regulus' wand to go flying across the room.

"Accio wand!" is out of his mouth before the wand even hits the floor, the brittle blackthorn flying into his outstretched hand. He's panting then, reeling from the rush of adrenaline and the sight of Regulus on the floor before him. He hears the words that Regulus is saying, but it's as though they don't quite compute, or his brain can't work fast enough to catch up with their meaning.

He raises his wand again, but hesitates. The powerful blood lust from before has subsided, replaced by a growing sense of disorientation. Regulus' words hold an unexpected note of desperation, but on the other hand, Sirius had expressly named his attackers before going into a coma. Still...

His hand shakes, indecision halting his actions as he stares down at the once noble and haughty Regulus Black.