Brainstorm is quiet for a moment to absorb that information as he continues taking Tarn's measurements. He wasn't particularly pleased to be this close with the leader of the DJD still-- not only could he murder him in a twitch, but he was filthy and kind of smelled. The sooner he finish with this, the better.

"Doesn't ring a bell. Beast modes wouldn't typically be a preference. If his spark is immune to your... ah, voice, then this might be a bit harder."

That would mean that there's something special about this mech's spark that he hasn't seen before. Fascinating! But then, he realizes maybe he has heard of something similar. He hums thoughtfully, finishing his measurements and taking a swift step back.

"Immortal sparks just don't exist. The closest that came were Nova and Galvatron, but that's because they were already dead. Dead Universe kinda does that to you. Can't kill the dead."

He touches his chest, over his spark, rubbing there. He still hadn't forgotten how a bunch of people climbed through his chest. Worst feeling ever. Rude.