Golem's Heart — ruling 1

Unlike Golem Foundry and the Smith cycle, Golem’s Heart’s ability triggers whenever any player casts an artifact spell, not just when you do.

Golem's Heart — ruling 2

Whenever a player casts an artifact spell, Golem’s Heart’s ability triggers and goes on the stack on top of it. It will resolve before the artifact spell does.

Golem's Heart : règles, fonctionnement et interactions (MTG)

Golem's Heart 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

Whenever a player casts an artifact spell, you may gain 1 life.

How it works : Golem's Heart

Original English text — Wizards of the Coast / Scryfall

#1January 1, 2011· Wizards of the Coast
Unlike Golem Foundry and the Smith cycle, Golem’s Heart’s ability triggers whenever any player casts an artifact spell, not just when you do.
No other card is named in this ruling.
#2January 1, 2011· Wizards of the Coast
Whenever a player casts an artifact spell, Golem’s Heart’s ability triggers and goes on the stack on top of it. It will resolve before the artifact spell does.
No other card is named in this ruling.