Meddling Mage — ruling 1

No one can cast spells or activate abilities between the time a card is named and the time that Meddling Mage's ability begins to apply.

Meddling Mage — ruling 2

Spells with the chosen name that somehow happen to already be on the stack when Meddling Mage enters the battlefield aren't affected by Meddling Mage's ability.

Meddling Mage : règles, fonctionnement et interactions (MTG)

Meddling Mage is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

As this creature enters, choose a nonland card name. Spells with the chosen name can't be cast.

How it works : Meddling Mage

Original English text — Wizards of the Coast / Scryfall

#1August 7, 2020· Wizards of the Coast
No one can cast spells or activate abilities between the time a card is named and the time that Meddling Mage's ability begins to apply.
No other card is named in this ruling.
#2August 7, 2020· Wizards of the Coast
Spells with the chosen name that somehow happen to already be on the stack when Meddling Mage enters the battlefield aren't affected by Meddling Mage's ability.
No other card is named in this ruling.