Windreaver | Magic: The Gathering
Formats Windreaver is Legal in
Official Oracle Text for Windreaver
: Windreaver gains vigilance until end of turn.
: Windreaver gets +0/+1 until end of turn.
: Switch Windreaver's power and toughness until end of turn.
: Return Windreaver to its owner's hand.
Official Rulings for Windreaver
4/15/2013 : Switching a creature's power and toughness twice (or any even number of times) effectively returns the creature to the power and toughness it had before any switches.