“Protection from [a player]” is a variant of the protection ability. A permanent or player with protection from a specific player has protection from each object that player controls and protection from each object that player owns not controlled by another player, regardless of that object’s characteristic values. Such a permanent or player can’t be targeted by spells or abilities the specified player controls and can’t be enchanted by Auras that player controls. Such a permanent can’t be equipped by Equipment that player controls, fortified by Fortifications that player controls, or blocked by creatures that player controls. All damage that would be dealt to such a permanent or player by sources controlled by the specified player or owned by that player but not controlled by another player is prevented.
August 23, 2019 · Commander 2019
“Protection from [a player]” is a variant of the protection ability. A permanent with protection from a specific player has protection from each object the player controls and protection from each object the player owns not controlled by another player, regardless of that object’s characteristic values. Such a permanent can’t be targeted by spells or abilities the player controls, enchanted by Auras the player controls, equipped by Equipment the player controls, fortified by Fortifications the player controls, or blocked by creatures the player controls, and all damage that would be dealt to it by sources controlled by the player or owned by the player but not controlled by another player is prevented.
November 1, 2013 · Commander 2013
Multiple instances of protection from the same quality on the same permanent or player are redundant.