Sanguine Sacrament — ruling 1

Sanguine Sacrament causes you to gain an amount of life equal to twice the number chosen for X as a single life-gain event. An ability that triggers “Whenever you gain life” will trigger only once.

Sanguine Sacrament : règles, fonctionnement et interactions (MTG)

Sanguine Sacrament 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

You gain twice X life. Put Sanguine Sacrament on the bottom of its owner's library.

How it works : Sanguine Sacrament

Original English text — Wizards of the Coast / Scryfall

#1September 29, 2017· Wizards of the Coast
Sanguine Sacrament causes you to gain an amount of life equal to twice the number chosen for X as a single life-gain event. An ability that triggers “Whenever you gain life” will trigger only once.
No other card is named in this ruling.