if someone had managed to successfully banish Vecna on the first encounter with them. How would the story of gone? Just to be clear, yes it's a "what if". But ment to be ask with a degree of tongue in cheek.

— Colin Beaumont (@Comieb) August 20, 2017

Not sure if they had the means to permanently do so at that time. Banishment is temp, and planeshift he can correct with the same. (1/2)

— Matthew Mercer (@matthewmercer) August 20, 2017

There might have been an ensuing hunt for a phylactery had they dealt enough damage, which would have been fun! (2/2)

— Matthew Mercer (@matthewmercer) August 20, 2017