Look at the top five cards of your library. You may reveal a colorless card from among them and put it into your hand. Then put the rest on the bottom of your library in any order.
All creatures have vigilance. At the beginning of each player's end step, tap all untapped creatures that player controls that didn't attack this turn. This artifact deals damage to the player equal to the number of creatures tapped this way.
If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost. Cast this spell only during combat. Create a 4/4 white Angel creature token with flying. Exile it at the beginning of the next end step.