If you have a way to untap Dwarven Blastminer before your untap step, you can use it multiple times in a single turn
If we end up having Elspeth, Sun's Champions tokens on the field, too, thats even better
The copy targets that creature
Her +1 loyalty ability to return a creature card from your graveyard to your hand seems useful, but, again, it's just not a good enough effect to be worth all this mana
(2014-09-20) Any time you have priority, you may turn the face-down creature face up by revealing what its morph cost is and paying that cost
We saw a lot of Expedition Map in Modern Tron decks of old and still do to some extent, but the Maps going to be good in all the same places where Sylvan Scrying would be, and many more