Sigma, Gravity's Controller

First strike
{w}{u}, {t}: Prevent all damage that would be dealt
to Sigma, Gravity's Controller until end of turn.
Until the beginning of your next end step Sigma, Gravity's Controller gets +0/+X. X is equal to
the amount of damage prevented this way.
{1}{u}{u}: Creatures you control get +0/+3 until
end of turn.
{2}{w}: Sigma, Gravity's Controller deals 4 damage
to target creature.