2023-11-10 : Each creature with lifelink dealing combat damage causes a separate life-gaining event. For example, if two creatures you control with lifelink deal combat damage at the same time, Elenda's Hierophant's second ability will trigger twice. However, if a single creature you control with lifelink deals combat damage to multiple creatures, players, and/or planeswalkers at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will trigger only once.

2023-11-10 : If Elenda's Hierophant is dealt lethal damage at the same time that you gain life, it won't receive a counter from its second ability in time to save it.

2023-11-10 : If you gain an amount of life "for each" of something, that life is gained as one event and the second ability of Elenda's Hierophant triggers only once.

2023-11-10 : In a Two-Headed Giant game, life gained by your teammate won't cause the second ability of Elenda's Hierophant to trigger even though it caused your team's life total to increase.

2023-11-10 : The second ability of Elenda's Hierophant triggers just once for each life-gaining event, no matter how much life was gained.