If you leave the game, the cards remain exiled face down indefinitely. No player may look at them.

Blightwing Bandit doesn't change when you can cast a spell. For example, if you exile a creature card without flash, you can cast it only during your main phase when the stack is empty.

Casting an exiled card causes it to leave exile. You can't cast it multiple times.

The six types of mana are white, blue, black, red, green, and colorless. Snow mana is not a type of mana. Blightwing Bandit won't let you pay a snow cost using mana produced by a nonsnow source.

You may look at and cast the exiled cards (and spend mana of any type to do so) even if Blightwing Bandit leaves the battlefield. If another player gains control of Blightwing Bandit, that player can't look at or cast the cards, and you still can.

You pay the costs for an exiled card if you cast it. You may pay any alternative costs the card has rather than the card's mana cost.