Show and Tell, Cunning Wish, and Meddling mage

[Jacemindbreak]

I play show and tell, then i show Omniscience.

He shows meddling mage. As the mage comes into play, can i use cunning wish, even if he proceeds to name cunning wish?

[porcupinetreeman]

I play show and tell, then i show Omniscience.

He shows meddling mage. As the mage comes into play, can i use cunning wish, even if he proceeds to name cunning wish?

You can't cast spells until mage and omni are in play. He will name before you can cast anything.

[Dice_Box]

As on a card means there is no trigger. That's why you still name even if something like Humility is in play.

[cdr]

Specifically, "as" indicates a replacement effect that replaces how the card enters the battlefield. Entering the battlefield becomes following the instructions of the replacement effect, then entering the battlefield.

http://www.yawgatog.com/resources/magic-rules/#R614
614.1c. Effects that read "[This permanent] enters the battlefield with . . . ," "As [this permanent] enters the battlefield . . . ," or "[This permanent] enters the battlefield as . . . " are replacement effects.