can i use this card at the beginning of my turn to copy tactic card played by the opponent during his last turn,

Or it must be played as counteraction to some tactic immediately ?

Action : Target a tactic just played. [...]

That mean a tactic that is not even yet resolveld, and the very last one.

Which raises an interesting point. Can you play two Twin-Tailed Comets in response to the same trigger? How would that work? Would the second be played in response to the first TTC? You cannot interrupt a stack once it begins to resolve so the second TTC would have to be played in response to the first, but what effect would be copied?

The second TTC would do the same thing as the first TTC (except that you get to choose targets again). And yes, you can do that.

Example: Will of the Electors (moving 2 developments), TTC (moving 2 more), TTC (moving 2 more), total devs moved = 6.

I think the notion of the 'active stack' or 'in response' should be raised here. wherein TTC occur BEFORE the tactic it is copying, as it was played more recently and placed on top of said metaphorical stack. refer to p15 of the rulebook... has unfortunate implications for copying something like the DE Uber spell, where you might instead try to steal your units back - but find they simply undo your work

I don't think there has been any ruling that "just played" means you must play TTC in response to a tactic, or even that you must target the last tactic to be played. I should think you only need to target a tactic in the current stack or most recent stack to resolve. I see no reason to believe you cannot wait for an opponent's tactic to resolve before targeting it with TTC.

RM

I can agree with the last post, but also I would not allow a player to copy something that happened last turn even if it was the most recent tactic played. To me, if an action window has passed since a card has been played, it's not really 'just played' anymore.

Good point. I would say you should be restricted to choosing a tactic that has been played during the current phase.

RM

Twin-tailed comet:

Action: Target a tactic just played . Copy the effects of that tactic without paying its cost. (You choose all targets of the copied tactic.)

Asuryan's cleansing:

Action: Cancel and discard target unit or support card being played unless its controller spends all resources in his pool. (If no resources remain, opponent can spend 0 resources to spend "all.")

I would say that yes, you can copy a tactic that has resolved, but, before anything else happens.

Tobogan said:

Templating issues like these are the reasons we need an official card reference and comprehensive rules document.

I think most people who have played a CCG or two in the past would expect TTC needs to target a tactic currently on the chain but as it's written you can't make a definitive claim it has to be that way.

Something interesting here: the FAQ defines "play" as "to play from the hand, paying all costs and following all restrictions". So technically speaking, if you let your opponent pay the costs for a unit or support card and add it to the chain it's too late to use AC as it is no longer "being played" and "has been played". Normally you would have to wait for your opponent to finish playing something before you could respond with your own tactic but the capital phase seems to make a special allowance for interrupting your opponents "playing" of a card since it says "Actions may be taken by either player at any time".

Looked at this way W:I definitely has more of a casual, Munchkin/Killer Bunnies, feel to it then a competitive CCG.

Which is why it will be the death knell of this game if the folly of a tournament scene (such that it is) is continued. The only organized play a game of this type should ever lay hands on is league play. Local and laid-back is the only way to keep the tourney-piranhas from deboning the game. Nearly all the griping and grousing on these boards centers around competitive discrepancies. I have yet to read a rantpost about the eye-bleedingly outsized Core Set boxes, and that's the most alarming miscarriage of justice yet.