Light of Promise

If you gain an amount of life “for each” of something, that life is gained as one event and the ability triggers only once.

In a Two-Headed Giant game, life gained by your teammate won't cause the ability to trigger, even though it caused your team's life total to increase.

If enchanted creature is dealt lethal damage at the same time that you gain life, it won't receive a counter from its ability in time to save it.