Magic is dead. The same thing happened with the energy counters from Kaladesh , the double-faced cards from Innistrad , phyrexian mana, planeswalkers, border changes, the introduction of Standard, and even the introduction of the 60-card deck limit
Once this card enters play a duel would probably be over in a turn or two
It is primarily filled with 300/400/500 attack monsters with only a few attributes and almost useless spells (Sparks - Deal 50 (!) damage to the opponent's LP)
Skycoach Conductor is here for that value, at a potentially low cost of , once you've paid the initial cost
These lands might at first appear innocuous - you can pay a life to fetch one of two different land types, so what
Where Aang, Swift Savior really excites me is in conjunction with cost reduction creatures like Quantum Riddler