Halls of Apprenticeship

{w}, Sacrifice Halls of Apprenticeship: Target player gains 2 life.
{u}, Sacrifice Halls of Apprenticeship: Target creature gains flying until end of turn.
{b}, Sacrifice Halls of Apprenticeship: Target player discards a card.
{r}, Sacrifice Halls of Apprenticeship: Target creature get +2/+0 until end of turn.
{g}, Sacrifice Halls of Apprenticeship: Put a -1/-1 counter on target creature with flying.