It doesn't copy whether that commander 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
So long as The Ur-Dragon is in either one of these zones, your other Dragon spells cost one less generic mana to cast
The tap mode discount makes this reasonably efficient when under pressure, so Id expect this to be fairly solid removal for more controlling decks
Intrude on the Mind So they give you four cards and a thopter
Chun-Li Tier This isnt Third Strike, so Chun Li stands for C-GRADE
Caesar allows you to choose from two of his effects every turn means that youll quickly be building up an impressive board presence, restocking your hand, and eventually directly burning your opponents once the Legion is numerous enough