Keeper of the Light — ruling 1

A different opposing player may be targeted each time the ability is activated.

Keeper of the Light — ruling 2

It is only necessary that the condition be true as you activate the ability. The ability will still resolve normally even if the condition is no longer true at that time.

Keeper of the Light : règles, fonctionnement et interactions (MTG)

Keeper of the Light 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

, : Choose target opponent who has more life than you do as you activate this ability. You gain 3 life.

How it works : Keeper of the Light

Original English text — Wizards of the Coast / Scryfall

#1October 1, 2009· Wizards of the Coast
A different opposing player may be targeted each time the ability is activated.
No other card is named in this ruling.
#2October 1, 2009· Wizards of the Coast
It is only necessary that the condition be true as you activate the ability. The ability will still resolve normally even if the condition is no longer true at that time.
No other card is named in this ruling.