You gain 5 life. When a spell or ability an opponent controls causes you to discard Mangara's Blessing, you gain 2 life, and you return Mangara's Blessing from your graveyard to your hand at the beginning of the next end step.
2004-10-04
The 2 life from having it discarded is gained when the triggered ability resolves, not at end of turn. Only the return to hand is done at end of turn.
2004-10-04
The Mangara's Blessing card is only returned if it is still in the graveyard at end of turn and never left the graveyard in the meantime.