No matter how many mountains are imprinted, the lens will only produce a single extra mana.
When you tap a land for mana, the Lens triggers. It's trigger says "does the card exiled with me have the same name as that land?" Since you have a mountain exiled, the answer is "yes" and you get another mana.
It in no way cares that there is more that one exiled mountain, as it doesn't say anything of the sort on the card.
Now, if you exiled a Island and a Forest, whenever you tap an Island or Forest for mana the lens will see you tapped a land that has the same name as a land imprinted, and make a mana of the appropriate color.
With tens, or hundreds, of thousands of copies printed of a single card, a few people buying up a couple hundred will not affect the price in any significant way.
That's not right. First you determine the total cost of the spell, then you pay the cost. So Trinisphere applies first (just after all other cost increases and reductions), and then, as you pay the total cost, Convoke applies, allowing you to tap creatures rather than pay mana.
So now, even with Trinisphere on the battlefield, you may cast Chord of Calling without paying mana.
Oh yeah, that's right.
So this change actually changes something slightly significant.
Basically, it just came up in a discussion in R&D. Given exactly what actions are taken when using convoke or delve to help pay for a spell, it honestly does make sense. I wouldn't take this as "Wizards hates cost reducers now", especially seeing as they just printed some cost reducers and increasers in the last couple blocks.
Somehow, i totally missed that.
(also, me saying "Wizards hates cost reducers now" was just me being facetious)
So, why did Wizards completely change convoke and delve, and what might it affect?
Does WotC just hate cost reducers now?
New vs old:
Convoke
Old reminder text: (Each creature you tap while casting this spell reduces its cost by 1 or by one mana of that creature's color.)
New reminder text: (Each creature you tap while casting this spell pays for 1 or one mana of that creature's color.)
Delve reminder text
Old reminder text: (You may exile any number of cards from your graveyard as you cast this spell. It costs 1 less to cast for each card exiled this way.)
New reminder text: (Each card you exile from your graveyard while casting this spell pays for 1.)
(inb4 obligatory "dumbing down the game" arguments)
The original dragon will trigger 5 times, once for each dragon entering, and the copies will each trigger 5 times. Once for themselves, and once for each other dragon entering.
So you'll get 30 separate triggers, each for 6 damage.
Storm is a triggered ability that exists on the stack separate from the Grapeshot.
Countering the original spell doesn't stop the ability, so the ability will resolve as normal and create 10 copies of grapeshot on the stack, each being a separate spell.
So you'd either need 10 more counterspells, or something like an overloaded Counterflux
With all modal spells and abilities, you choose when the object goes on the stack.
603.3c If a triggered ability is modal, its controller announces the mode choice when he or she puts the ability on the stack. If one of the modes would be illegal (due to an inability to choose legal targets, for example), that mode can't be chosen. If no mode can be chosen, the ability is removed from the stack. (See rule 700.2.)
Yep.
When Faith's Reward resolves,it returns all your permanents to the battlefield that hit the GY this turn.
It doesn't care they went to the grave after it was cast but before it resolved.
I think you misread the OP
Yep, was added in the M14 rules update
http://www.wizards.com/Magic/Magazine/Article.aspx?x=mtg/daily/feature/255c&page=3
When you tap a land for mana, the Lens triggers. It's trigger says "does the card exiled with me have the same name as that land?" Since you have a mountain exiled, the answer is "yes" and you get another mana.
It in no way cares that there is more that one exiled mountain, as it doesn't say anything of the sort on the card.
Now, if you exiled a Island and a Forest, whenever you tap an Island or Forest for mana the lens will see you tapped a land that has the same name as a land imprinted, and make a mana of the appropriate color.
The Gravestorm trigger is a normal triggered ability, and Stifle counters it, preventing any copies from being created.
+1
Oh yeah, that's right.
So this change actually changes something slightly significant.
Somehow, i totally missed that.
(also, me saying "Wizards hates cost reducers now" was just me being facetious)
Does WotC just hate cost reducers now?
New vs old:
Convoke
Old reminder text:
(Each creature you tap while casting this spell reduces its cost by 1 or by one mana of that creature's color.)
New reminder text:
(Each creature you tap while casting this spell pays for 1 or one mana of that creature's color.)
Delve reminder text
Old reminder text:
(You may exile any number of cards from your graveyard as you cast this spell. It costs 1 less to cast for each card exiled this way.)
New reminder text:
(Each card you exile from your graveyard while casting this spell pays for 1.)
So you'll get 30 separate triggers, each for 6 damage.
30*6=180 damage.
Countering the original spell doesn't stop the ability, so the ability will resolve as normal and create 10 copies of grapeshot on the stack, each being a separate spell.
So you'd either need 10 more counterspells, or something like an overloaded Counterflux
603.3c If a triggered ability is modal, its controller announces the mode choice when he or she puts the ability on the stack. If one of the modes would be illegal (due to an inability to choose legal targets, for example), that mode can't be chosen. If no mode can be chosen, the ability is removed from the stack. (See rule 700.2.)
When Faith's Reward resolves,it returns all your permanents to the battlefield that hit the GY this turn.
It doesn't care they went to the grave after it was cast but before it resolved.