Divine Favor — ruling 1

If the creature targeted by Divine Favor is an illegal target when Divine Favor tries to resolve, Divine Favor won't resolve. It won't enter the battlefield and its enters-the-battlefield ability won't trigger.

Divine Favor : règles, fonctionnement et interactions (MTG)

Divine Favor 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

Enchant creature When this Aura enters, you gain 3 life. Enchanted creature gets +1/+3.

How it works : Divine Favor

Original English text — Wizards of the Coast / Scryfall

#1July 18, 2014· Wizards of the Coast
If the creature targeted by Divine Favor is an illegal target when Divine Favor tries to resolve, Divine Favor won't resolve. It won't enter the battlefield and its enters-the-battlefield ability won't trigger.
No other card is named in this ruling.