風を裂くもの

飛行
{W}：風を裂くものはターン終了時まで警戒を得る。
{W}：風を裂くものはターン終了時まで＋０/＋１の修整を受ける。
{U}：ターン終了時まで、風を裂くもののパワーとタフネスを入れ替える。
{U}：風を裂くものをオーナーの手札に戻す。

Windreaver

Flying
{W}: Windreaver gains vigilance until end of turn.
{W}: Windreaver gets +0/+1 until end of turn.
{U}: Switch Windreaver's power and toughness until end of turn.
{U}: Return Windreaver to its owner's hand.

RNA Guild Kit

Duel Decks: Venser vs. Koth

Dissension

Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to a creature may become lethal if you switch its power and toughness during that turn.

Effects that switch a creature's power and toughness apply after all other effects, regardless of when those effects began to apply. For instance, if you target a 1/2 creature then give it +2/+0 later in the turn, it's a 2/3 creature, not a 4/1 creature.

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.