Roller Lines are lines perpendicular to the length of the card, which normally appear two at a time at 1/3 or 2/3 down the length of the card
It brings back any permanent with a mana value of three or less, and there is no shortage of amazing ones at that mana range, including other Bats that can let you keep the pressure up
If you were mana screwed, you no longer will be
(To mill a card, a player puts the top card of their library into their graveyard.) The game starts with no monarch
Its an impressive set with a lot of potential and some incredibly entertaining cards, but not all of them can make the cut when youre talking about the formats outside of Draft or Sealed
So in a theoretical offensive situation, you can perhaps transform another battle with it, while pinging a potential defender to push more damage to any other relevant target(s)