Master Chief

—Indestructible, Trample & cannot attack unless there is another Spartan in play.
All spartans have{t},{ut} Master Chief.
{g}{t} Sacrifice 1 CMC creature create a 3/3 Spartan with vanishing 3.
{r}{g}{t} Sacrifice 2 CMC creature create a 4/4 Spartan with trample and hexproof.
{1}{1}{r}{t} Sacrifice 3 CMC creature create a 6/3 Spartan with haste, first strike and vanishing 2.
{g}{g}{r}{r}{t} Sacrifice 4 CMC creature create a 6/6 spartan