Kavu Predator

2018-03-16 Each creature with lifelink dealing combat damage is a single life-gaining event. For example, if two creatures an opponent controls with lifelink deal combat damage at the same time, Kavu Predator's ability will trigger twice. However, if a single creature an opponent controls 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.

2018-03-16 If an opponent gains an amount of life "for each" of something (such as from Congregate), that life is gained as one event and Kavu Predator's ability triggers only once.

2018-03-16 Kavu Predator's last ability triggers just once for each life-gaining event, whether it's 1 life from Kor Firewalker or 6 life from Renewed Faith.