Crown of Convergence

Text:

Play with the top card of your library revealed.
As long as the top card of your library is a creature card, creatures you control that share a color with that card get +1/+1.
: Put the top card of your library on the bottom of your library.

Rulings:

• 10/1/2005 A colorless creature on top of your library never gives a bonus, and a colorless creature on the battlefield never gets a bonus.
• 4/15/2013 The top card of your library isn’t in your hand, so you can’t suspend it, cycle it, discard it, or activate any of its activated abilities.
• 4/15/2013 If the top card of your library changes while you’re casting a spell, playing a land, or activating an ability, the new top card won’t be revealed until you finish doing so.
• 4/15/2013 When playing with the top card of your library revealed, if an effect tells you to draw several cards, reveal each one before you draw it.