Any rule, object, or effect that refers to an “attacking player” refers to one specific attacking player, not to all attacking players. If an ability of a blocking creature refers to an attacking player, or a spell or ability refers to both a blocking creature and an attacking player, then unless otherwise specified, the attacking player it’s referring to is the player who controls the attacking creature that blocking creature is blocking. If a spell or ability could apply to multiple blocking creatures, the appropriate attacking player is individually determined for each of those blocking creatures. If there are multiple attacking players that could be chosen, the controller of the spell or ability chooses one.
January 25, 2019 · Ravnica Allegiance
Any rule, object, or effect that refers to an "attacking player" refers to one specific attacking player, not to all attacking players. If an ability of a blocking creature refers to an attacking player, or a spell or ability refers to both a blocking creature and an attacking player, then unless otherwise specified, the attacking player it's referring to is the player who controls the attacking creature that blocking creature is blocking. If a spell or ability could apply to multiple blocking creatures, the appropriate attacking player is individually determined for each of those blocking creatures. If there are multiple attacking players that could be chosen, the controller of the spell or ability chooses one.
July 13, 2018 · Core Set 2019
Any rule, object, or effect that refers to an “attacking player” refers to one specific attacking player, not to all attacking players. If an ability of a blocking creature refers to an attacking player, or a spell or ability refers to both a blocking creature and an attacking player, then unless otherwise specified, the attacking player it’s referring to is the player who controls the attacking creature that blocking creature is blocking. If a spell or ability could apply to multiple blocking creatures, the appropriate attacking player is individually determined for each of those blocking creatures. If there are multiple attacking players that could be chosen, the controller of the spell or ability chooses one.
June 5, 2017 · Commander Anthology
Any rule, object, or effect that refers to an “attacking player” refers to one specific attacking player, not to all of the attacking players. If an ability of a blocking creature refers to an attacking player, or a spell or ability refers to both a blocking creature and an attacking player, then unless otherwise specified, the attacking player it’s referring to is the player who controls that attacking creature. If a spell or ability could apply to multiple blocking creatures, the appropriate attacking player is individually determined for each of those blocking creatures. If there are multiple attacking players that could be chosen, the controller of the spell or ability chooses one.