二重詠唱の魔道士

08/06/2016

Dualcaster Mage’s triggered ability can target (and copy) any instant or sorcery spell, not just one with targets. It doesn’t matter who controls it.

08/06/2016

If the copy says that it affects “you,” it affects the controller of the copy, not the controller of the original spell. Similarly, if the copy says that it affects an “opponent,” it affects an opponent of the copy’s controller, not an opponent of the original spell’s controller.

08/06/2016

If the spell is modal (that is, it says “Choose one —” or the like), the copy will have the same mode. You can’t choose a different one.

08/06/2016

The copy will have the same targets as the spell it’s copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can’t choose a new legal target, then it remains unchanged (even if the current target is illegal).