Sarkhan, Soul Aflame

Sarkhan copies exactly what was printed on the original Dragon and nothing else, with the noted exceptions (unless that creature is a token; see below). It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on in response to Sarkhan's ability.

In some unusual cases, the Dragon that entered the battlefield will be copying something else by the time Sarkhan's ability resolves. In such a case, Sarkhan will copy whatever the Dragon is copying, with the noted exceptions.

Sarkhan's first ability doesn't change the mana cost or mana value of any Dragon spell. It changes only the total cost you pay.