Tezzeret's Ambition — ruling 1

No player may take actions between the time you draw three cards and the time you discard. Notably, you can't try to get an artifact onto the battlefield using the three cards you drew to avoid discarding.

Tezzeret's Ambition : règles, fonctionnement et interactions (MTG)

Tezzeret's Ambition 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

Draw three cards. If you control no artifacts, discard a card.

How it works : Tezzeret's Ambition

Original English text — Wizards of the Coast / Scryfall

#1September 20, 2016· Wizards of the Coast
No player may take actions between the time you draw three cards and the time you discard. Notably, you can't try to get an artifact onto the battlefield using the three cards you drew to avoid discarding.
No other card is named in this ruling.