Phantasmal Fiend | Magic: The Gathering
Formats Phantasmal Fiend is Legal in
Official Oracle Text for Phantasmal Fiend
: Switch Phantasmal Fiend's power and toughness until end of turn.
Official Rulings for Phantasmal Fiend
10/1/2008 : Effects that switch power and toughness are always applied last when determining a creature's power and toughness, even if other power/toughness-changing effects are created later in the turn. For example, if you activate Phantasmal Fiend's first ability, it will become 2/4. Then if you activate its second ability, it will become 4/2. Then if you activate its first ability again, it will become 3/3.
4/15/2013 : Effects that switch power and toughness apply after all other effects that change power and/or toughness, regardless of which effect was created first.
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.