Dream-Thief's Bandana
Whenever equipped creature deals combat damage to a player, look at the top card of their library, then exile it face down. For as long as it remains exiled, you may play it, and mana of any type can be spent to cast that spell.
Equip 
Illustrated by Danny Schwartz
This printing
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You may look at and play cards exiled face down with Dream-Thief's Bandana's first ability (and spend mana of any type to do so) even if Dream-Thief's Bandana and/or the equipped creature leaves the battlefield. If another player gains control of Dream-Thief's Bandana and/or the equipped creature, that player can't look at or play cards already exiled with Dream-Thief's Bandana, and you still can.
Playing an exiled card causes it to leave exile. You can't play it multiple times.
You pay all costs and follow all normal timing rules for cards played from exile with Dream-Thief's Bandana's first ability. For example, if the exiled card is a land card, you may play it only during your main phase while the stack is empty.
If you leave the game, any remaining face-down exiled cards remain exiled face down indefinitely. No player may look at them.
