Into the Pit

If the top card of your library changes while you're casting a spell, playing a land, activating an ability, or taking a special action, you can't look at the new top card until you finish doing so. This means that if you cast a spell from the top of your library, you can't look at the next one until you're done paying for that spell.

You pay all costs and follow all timing rules for spells cast from the top of your library this way.

While you control Into the Pit, if the top card of your library has disguise or morph, you may cast it face down from the top of your library by paying 3 generic mana and sacrificing a nonland permanent.