Breath of Fury
Enchantment — Aura
Enchant creature you control
When enchanted creature deals combat damage to a player, sacrifice it and attach this Aura to a creature you control. If you do, untap all creatures you control and after this phase, there is an additional combat phase.
Kev Walker
Commander 2016 (C16)
• #121Rulings
If there isn’t a legal creature to attach Breath of Fury to after the enchanted creature is sacrificed, you don’t untap your creatures or get an additional combat phase, and Breath of Fury is put into its owner’s graveyard as a state-based action.
(wotc • 2005-10-01)
Rulings
If there isn’t a legal creature to attach Breath of Fury to after the enchanted creature is sacrificed, you don’t untap your creatures or get an additional combat phase, and Breath of Fury is put into its owner’s graveyard as a state-based action.
(wotc • 2005-10-01)