A flash-able walker of the planes is strong since they cannot be attacked by foes for a full round, and you can still user her ability once
In either scenario, timing is everything when it comes to playing this card since your opponents will usually get to take full advantage of its mana doubling before you do
As long as you can repetitively replay and kill off your own creatures, you can easily drain your opponents life to zero
And since this rat ninja says play, you can also play lands from the cards exiled if you want
It doesn't have to be actual card advantage, or even mana advantage
Enchanted cards from The First Chapter (Set 1) are well above their launch prices now, driven partly by nostalgia and partly by the simple logic that the first Enchanted of a beloved character is the defining version in most collectors' minds