Hamershrake, Dracocliff Roost

When a Dragon or Human enters the battlefield,
gain 2 life and draw a card.
{t}: Add {1} to you mana pool. If this is used to
cast a Dragon or Human card, add {3} to your
mana pool instead.
{1}, {t}: Add two of any color to your mana pool if
you control a Dragon or Human.