Lightning Rampage is, of course, the main draw of the card
While the two-faced layout was a huge gain to Day/Night, it didn't solve the fundamental problem
If you're hoping to open something iconic, but don't want to play a colorless-themed deck with Ugin, perhaps I can interest you in the other card pre-selling for $80: Mox Jasper
For example, if you cast Junkblade Bruiser (a creature with a mana value of 5 and an ability that triggers whenever you expend 4) by paying its full cost of five mana, you'll already have spent four mana on spells before Junkblade Bruiser enters, and therefore its ability that triggers whenever you expend 4 won't be able to trigger at all that turn.
Cardpecker: A creature card that can tap to peck at an opponent's library, adding a humorous touch of interactivity