Shard of Mount Prism

{1}{w}, {t}: You gain 5 life.
{1}{u}, {t}: Draw a card, then discard a card.
{1}{b}, {t}: Target creature gets -2/-2 until
end of turn.
{1}{r}, {t}: Obelisk of Alara deals 3 damage to
target player or planeswalker.
{1}{g}, {t}: Target creature gets +4/+4 until
end of turn