Warleader's Helix — ruling 1

If the chosen target becomes an illegal target for Warleader’s Helix, the spell doesn’t resolve. You don’t gain life.

Warleader's Helix : règles, fonctionnement et interactions (MTG)

Warleader's Helix 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

Warleader's Helix deals 4 damage to any target and you gain 4 life.

How it works : Warleader's Helix

Original English text — Wizards of the Coast / Scryfall

#1December 7, 2018· Wizards of the Coast
If the chosen target becomes an illegal target for Warleader’s Helix, the spell doesn’t resolve. You don’t gain life.
No other card is named in this ruling.