The Fourth Dragon War

{5}{r}{r}: Create a 5/5 red Dragon creature token
with flying and "{r}: This creature gets +1/+0
until end of turn.
{5}{u}{u}: Create a 5/5 blue Dragon creature token
with flying and prowess.
{2}{u}{u}{r}{r}, Sacrifice The Fourth Dragon War:
create Niv-Mizzet, the Firemind, a 4/4 dragon
with flying, "Whenever you draw a card, Niv-
Mizzet, the Firemind deals 1 damage to target
creature or player." and "{t}: Draw a card."