Elenda's Hierophant

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

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.

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.