Tavern Swindler — ruling 1

You can't activate Tavern Swindler's ability if your life total is less than 3. You can activate it if your life total is exactly 3, but it's probably a bad idea. You'll lose the game before the ability resolves.

Tavern Swindler : règles, fonctionnement et interactions (MTG)

Tavern Swindler 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

, Pay 3 life: Flip a coin. If you win the flip, you gain 6 life.

How it works : Tavern Swindler

Original English text — Wizards of the Coast / Scryfall

#1November 17, 2017· Wizards of the Coast
You can't activate Tavern Swindler's ability if your life total is less than 3. You can activate it if your life total is exactly 3, but it's probably a bad idea. You'll lose the game before the ability resolves.
No other card is named in this ruling.