Astral Visions

At the end of each end step, the player who's turn is ending may reveal the top card of their library. If they do, they may activate one of the following effects based on the color of the card revealed;
•White: Gain 2 life.
•Blue: Untap two lands.
•Black: Create a 1/1 Black Zombie creature token.
{bull}Red: Deal 2 damage to any target.
{bull}Green: Give a creature +1/+1 until your next turn.