To play devil's advocate, their topic states that they found an extra light sprite while "cleaning out" their hoard.
I don't believe you can have two dragons with the same familiar so if they aren't lying about having two they could have just CR'd the one still in their hoard
Re: demonweasel & the Light Sprite Raffle
I don't believe you can have two dragons with the same familiar so if they aren't lying about having two they could have just CR'd the one still in their hoard