Boros Fury-Shield
Instant
Prevent all combat damage that would be dealt by target attacking or blocking creature this turn. If 
was spent to cast this spell, Boros Fury-Shield deals damage to that creature's controller equal to the creature's power.
Wayne England
Rulings
If red mana was spent, Boros Fury-Shield, not the target creature, deals the damage to the creature’s controller.
(wotc • 2005-10-01)
Rulings
If red mana was spent, Boros Fury-Shield, not the target creature, deals the damage to the creature’s controller.
(wotc • 2005-10-01)