Psychic Battle | Magic: The Gathering
Formats Psychic Battle is Legal in
Official Oracle Text for Psychic Battle
Official Rulings for Psychic Battle
10/4/2004 : You can change all, some, or none of the targets.
10/4/2004 : You can't change the number of targets, choose an illegal target, or make something get targeted more than once.
10/4/2004 : An empty library will have no card to reveal, so a player with an empty library has no card to compare. The effect looks for the highest cost card of the cards that actually are revealed.