Worry furrows Vrardurz's brow as the coruscating arcane energy grows in both strength and volume. "They're overloading the elemental engine. Take cover before it blows!" he shouts to his comrades, still hurrying towards them. Realizing the need to provide them with a means of escaping, but unable to close the distance by conventional means, he dashes as quickly as he can, before briefly disapparating momentarily and reappearing in a puff of silvery mist. He mutters a one-liner joke in the Dar tongue, and dances preposterously, seeking to ungird the warforged's mind long enough to let Drauger escape, or at least to assist the others in escaping.

Spoiler: OOC
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Vrardurz will move 30', cast Misty Step as a bonus action to move another 30', and get into range to cast Tasha's Hideous Laughter on the one warforged in range. DC 15 wis save or he's prone and incapacitated.