Nurturing Bond

As Nurturing Bond enters the battlefield,
choose a creature type. Whenever you cast a
creature spell of the chosen type, choose one
that hasn't been chosen this turn:
• Creature spells of the chosen type you cast
this turn cost {1} less to cast.
• Creatures you control of the chosen type gain
ward {1} until end of turn.
• If its mana value is 4 or greater, draw a card.
Otherwise, gain 2 life.