Evangelize — ruling 1

When you put the spell on the stack, you choose an opponent, then that opponent chooses the target. This is not a choice made on resolution.

Evangelize — ruling 2

The target of the spell is a creature the chosen opponent controls. As Evangelize resolves, if the target isn’t a creature controlled by the chosen opponent, Evangelize won’t resolve. If Evangelize’s target is changed (via Shunt, for example), the new target must be a creature controlled by the chosen opponent.

Evangelize : règles, fonctionnement et interactions (MTG)

Evangelize 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

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.) Gain control of target creature of an opponent's choice they control.

How it works : Evangelize

Original English text — Wizards of the Coast / Scryfall

#1September 25, 2006· Wizards of the Coast
When you put the spell on the stack, you choose an opponent, then that opponent chooses the target. This is not a choice made on resolution.
No other card is named in this ruling.
#2September 25, 2006· Wizards of the Coast
The target of the spell is a creature the chosen opponent controls. As Evangelize resolves, if the target isn’t a creature controlled by the chosen opponent, Evangelize won’t resolve. If Evangelize’s target is changed (via Shunt, for example), the new target must be a creature controlled by the chosen opponent.
No other card is named in this ruling.