Light of Promise
Luz da Promessa
Luz de la promesa
Enchantment — Aura
Enchant creature Enchanted creature has "Whenever you gain life, put that many +1/+1 counters on this creature."
If you gain an amount of life “for each” of something, that life is gained as one event and the ability triggers only once.
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.