Silven flow over the town and hovered looking for the pair while his mana regen.  He spotted them but made no motion before them.  Instead, he flew just out of their line of sight and cast levitate on himself landing on a tree limb and crawled silently on his belly across it while his dragon flew off.  Smiling to himself, he found himself looking down upon the Elves.  He knew not if they noticed him or not, but right now he was just observing to see how they would react to his attack.