MTG Salvation

1/1/2011 Furnace Celebration itself doesn’t allow you to sacrifice any permanents. Its ability triggers whenever you sacrifice a permanent because some other spell, ability, or cost instructed you to.

1/1/2011 You choose the target when the ability triggers. You choose whether or not to pay as the ability resolves. You can’t pay more than once for a single sacrificed permanent.

1/1/2011 Although players may respond to the ability, once it starts to resolve and you decide to pay , it’s too late for players to respond.

1/1/2011 Sacrificing a Furnace Celebration will cause the abilities of other Furnace Celebrations to trigger, but not its own ability.