Giga-Thon, the Water Drake

{2}, All creatures you control, gain flying.
{3}, Sacrifice a creature, draw cards equal to
that creatures toughness.
{5}{u}, Summon 2, 5/6 Pirakna creature tokens.
{10}{u/b}{u/b}{u/b}, Gain an emblem that says "When
you play a creature, draw a card.
If that creature was blue, or black, destroy target artifact."