The light show isn't what draws Megatron's attention to their location; he'd already picked up Breakdown's energy signature, and as the only one he's been able to find, he was already making a beeline for it.

The tremendous laser blast does give him pause, but only for a moment – mere seconds after Sollux's eye beams sweep the desert Megatron drops out of the sky almost directly above them, transforming on the way down and throwing up sand as his ridiculous cloven robot feet hit the ground a few metres from Breakdown. There's a low whine in the air as he straightens up and looks around, his cannon already powering up, but the other Decepticon doesn't seem to be under attack.

"Breakdown." His eyes are on the troll at his soldier's side, rather than on Breakdown himself – the idea that this organic creature could have been the source of the blast isn't an obvious or intuitive one, but he knows full well it's possible. "Where is your partner – and what is this creature?"

He knows what an Alternian is, obviously – he's spoken with enough of them himself, over the centuries – but they're not here to negotiate with Alternians, and a little imperiousness never hurt anyone.