Halvor and I were playing a game tonight and this question came up:
I put and revealed an essence drain on a Hydra. Because I knew he had dispels, I then put a Nullify on the same hydra. He never ended up dispelling the hydra so this didn't come up until the game was over and we were chatting.
The question is whether Nullify can be used on enemy units. The card states, "When this creature is targeted by an incantation or enchantment spell controlled by an opponent, you MUST reveal Nullify during the Counter step. This spell is countered. Then, destroy Nullify."
So does the wording "a spell controlled by the opponent" refer to the opponent of the enchantment owner, or to the opponent of the creature? The way I am reading it, it refers to the opponent of Nullify's owner. If so there should be some less ambiguous way to word Nullify's text. Maybe "when this creature is targeted by a spell controlled by an opponent of Nullify's controller".
Assuming nullify would work on enemy creatures, what about this sequence:
1) I put nullify on enemy Mage.
2) I put reflect magic on my Mage.
3) He casts a dissolve on my Mage.
4) I reveal reflect and the dissolve goes back at his Mage.
The way I think it would work is, at this point I am the controller of both Dissolve and the hidden Nullify. Because I am not my own opponent, I am not required to reveal nullify and the Dissolve works normally. Am I correct?