Rulings
The ability triggers whenever any player, not just you, casts a white spell.
(wotc • 2009-10-01)
If a player casts a white spell, Angel’s Feather’s ability triggers and is put on the stack on top of that spell. Angel’s Feather’s ability will resolve (causing you to gain 1 life) before the spell does.
(wotc • 2009-10-01)
Rulings
The ability triggers whenever any player, not just you, casts a white spell.
(wotc • 2009-10-01)
If a player casts a white spell, Angel’s Feather’s ability triggers and is put on the stack on top of that spell. Angel’s Feather’s ability will resolve (causing you to gain 1 life) before the spell does.
(wotc • 2009-10-01)