Honor Troll

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, Honor Troll's second ability will apply 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 apply only once.

In a Two-Headed Giant game, life gained by your teammate won't cause Honor Troll's second ability to apply, even though it will cause your team's life total to increase.

The middle ability of Honor Troll applies just once to each life-gaining event, whether it's 1 life from Impassioned Orator or 4 life from Dawning Angel. If you gain an amount of life "for each" of something or "equal to the number" of something, that life is gained as one event and the ability of Honor Troll applies only once.

In multiplayer formats where your life total doesn't start at 20, Honor Troll's last ability still applies if your life total is 25 or more.