[fixed/closed]Miracle cost not affected by cost modifiers

[Nexhro]

Describe the Bug:
When a spell is cast for its miracle cost, it's not affected by cost modifiers a la Sphere of Resistance or Thorn of Amethyst. Tested this with Revenge of the Hunted and Terminus .
Entreat the Angels (and presumably Bonfire of the Damned), however, is affected by cost modifiers when casting it for its miracle cost.

A spell with converted mana cost 4 or more can be cast for its miracle cost when Gaddock Teeg is on the battlefield. Tested this with Revenge of the Hunted and Terminus .
Entreat the Angels (and presumably Bonfire of the Damned) cannot be cast for its miracle cost when Gaddock Teeg is on the battlefield.

Which card did behave improperly ?
Revenge of the Hunted, Terminus

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
April 17 2014, duel

What exactly should be the correct behavior/interaction ?
When a spell is cast for its miracle cost, it's affected by cost modifiers.

A spell with converted mana cost 4 or more cannot be cast for its miracle cost when Gaddock Teeg is on the battlefield.

Are any other cards possibly affected by this bug ?
Likely Banishing Stroke, Blessings of Nature, Devastation Tide, Reforge the Soul, Temporal Mastery, Thunderous Wrath and Vanishment
Not likely Bonfire of the Damned

[Gargaroz]

Well, I don't think the Miracle cost should be modified by thing like Sphere of Resistence, which modified only the MANA COST, while this is an ALTERNATIVE MEANS OF CASTING. If you look at Force of Will, the ruling is clearly different.
However, the Gaddock Teeg bug was really there, and is fixed as 6f99492

[Nexhro]

Well, I don't think the Miracle cost should be modified by thing like Sphere of Resistence, which modified only the MANA COST, while this is an ALTERNATIVE MEANS OF CASTING. If you look at Force of Will, the ruling is clearly different.

Yeah, I wasn't completely sure about it, either, so I had checked the rules before I posted the report. Casting a spell for its Miracle cost isn't different than casting Force of WIll by exiling a blue card and paying 1 life in this regard.

Comprehensive Rules on the matter at hand:

702.92a Miracle is a static ability linked to a triggered ability (see rule 603.10). “Miracle [cost]” means “You may reveal this card from your hand as you draw it if it’s the first card you’ve drawn this turn. When you reveal this card this way, you may cast it by paying [cost] rather than its mana cost.”

117.9. Some spells have alternative costs. An alternative cost is a cost listed in a spell’s text, or applied to it from another effect, that its controller may pay rather than paying the spell’s mana cost. Alternative costs are usually phrased, “You may [action] rather than pay [this object’s] mana cost,” or “You may cast [this object] without paying its mana cost.” Note that some alternative costs are listed in keywords; see rule 702.

117.9a Only one alternative cost can be applied to any one spell as it’s being cast. The controller of the spell announces his or her intentions to pay that cost as described in rule 601.2b.

117.9b Alternative costs are always optional.

117.9c An alternative cost doesn’t change a spell’s mana cost, only what its controller has to pay to cast it. Spells and abilities that ask for that spell’s mana cost still see the original value.

117.9d If an alternative cost is being paid to cast a spell, any additional costs, cost increases, and cost reductions that affect that spell are applied to that alternative cost

[BAgate]

I was so unsure, I actually looked up the rule too when I confirmed it. Nexhro, very nice summary.

[Gargaroz]

Oh, I see, fixed in 88ef4fc

[Aswan jaguar]

- Entreat the Angels (which used to work correctly before) is not affected by cost modifiers (Thorn Amethyst,Sphere of Resistence)
- Revenge of the Hunted still not affected by cost modifiers (Thorn Amethyst,Sphere of Resistence)
- Blessings of Nature still not affected by cost modifiers (Thorn Amethyst,Sphere of Resistence)
- Terminus still not affected by cost modifiers (Thorn Amethyst,Sphere of Resistence)
- Banishing Stroke still not affected by cost modifiers (Thorn Amethyst,Sphere of Resistence)

I guess it is safe to say that miracle still is not affected by cost modifiers (Thorn Amethyst,Sphere of Resistence)

[Gargaroz]

Here's one case in which the fix was there, but the order of the arguments of the functions was wrong, and for some unspeakable miracle did not caused any crash.
However, fixed in ac3a062