The skeleton lord emits an aura that managed to knock all of us back. The height and size of the skeleton lord began to change as it's become much taller and bigger. Much bigger than the elite skeleton size, it must be because of the skill growth that makes the skeleton lord gain this much size and height.
But I do think it doesn't matter as much as the skeleton lord just increases its physical appearance and not its stats. We still can defeat the skeleton lord because we had Sir Esmir and Captain Callum. Both of them were pretty much could defeat the Skeleton Lord without any much of a problem, I think.
"Puny humans! Do you think that with this number, you could defeat me... Better think again!" The skeleton lord said as it swings its large sword towards Sir Esmir.