The appropriate permanents enter tapped. They do not enter untapped and then immediately tap, therefore they do not trigger any effects due to tapping.
01-02-2007
wotc
It affects all opponents.
01-02-2007
wotc
It applies to cards and tokens that are put onto the battlefield by an effect, as well as ones that are played from the player's hand.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.