Dark Confidant and Fire/Ice

[Killane]

How much damage, and why?

Edit: Please excuse the poor quality of the inital question - I was on my phone and did not have the patience to type out the full question because I am texting-challenged, but it was immediately relevant.

Those who already provided the answer were, of course, correct- How much damage does one take from flipping Fire/Ice (or any split card, really)?

[vassago]

I am assuming you're talking about how you'd take from flipping fire/ice?

If so, it's four damage, or loss of life.

If you're asking about how much damage to deal to it with fire, one to him and one to the face is the answer.

[Delha]

From the Comp Rules:

708.5. An effect that asks for a particular characteristic of a split card while it’s in a zone other than the stack gets two answers (one for each of the split card’s two halves).
Example: Infernal Genesis has an ability that reads, “At the beginning of each player’s upkeep, that player puts the top card from his or her library into his or her graveyard. He or she then puts X 1/1 black Minion creature tokens onto the battlefield, where X is that card’s converted mana cost.” If the top card of your library is Assault/Battery when this ability resolves, the game sees its converted mana cost as “1, and 4.” You get five creature tokens.

[ELD]

A similar question came up with counterbalance and Fire/Ice at my legacy event this week.  They knew that flipping it with bob was 4 damage, so they incorrectly thought it countered as 4 for Counterbalance. 

I prefer to remember it as 2+2 loss of life, or the CMC being 2 and 2.  People tend to get confused when the shortcut it to 4.  Just a tip that keeps it straight in my mind.  

Edit:  Added "incorrectly" to clarify that fire/ice is not 4 cmc for CB. 

[honestabe]

A similar question came up with counterbalance and Fire/Ice at my legacy event this week.  They knew that flipping it with bob was 4 damage, so they thought it countered as 4 for Coutnerbalance.

I prefer to remember it as 2+2 loss of life, or the CMC being 2 and 2.  People tend to get confused when the shortcut it to 4.  Just a tip that keeps it straight in my mind. 

Its my understanding if you flip a double card with CB, that you get to chose one of the individual spells.  I was looking it up the other day, but i might have misread

[ELD]

That is basically correct.  You don't actually get to choose which half of the split card that is used for counterbalance though.  Both sides are applied.  If either is the same CMC, then the spell is countered. 

[Clariax]

Its my understanding if you flip a double card with CB, that you get to chose one of the individual spells.  I was looking it up the other day, but i might have misread

There is no choice involved, the effect will simply use both numbers.  In the case of Counterbalance, it asks the question "Does the CMC of the revealed card equal the CMC of the spell?"  If you flip Boom//Bust, the CMC of the revealed card will be 2 and 6, so if the CMC of the spell that triggered it is 2 or 6, the answer will be "yes," and the spell will be countered.  If the CMC of the spell is 2, you cannot reveal Boom//Bust then choose to use the 6 and not counter the spell.