At the beginning of each end step, if you gained 4 or more life this turn, create a 4/4 white Angel creature token with flying.
Michael C. Hayes
In a Two-Headed Giant game, life gained by your teammate isnâ€™t considered, even though it causes your teamâ€™s life total to increase.
If you havenâ€™t gained 4 or more life during the turn when the end step begins, the ability wonâ€™t trigger at all. Gaining life during the end step wonâ€™t cause the ability to trigger.
Angelic Accordâ€™s ability checks how much life youâ€™ve gained during the turn, not what your life total is compared to what it was when the turn began. For example, if you start the turn at 10 life, gain 6 life during the turn, then lose 6 life later that turn, the ability will trigger.