Servologist

(You can't cast this spell if an opponent controls
a red permanent)
Lifelink, Protection from Red
When Servologist enters the battlefield,
create X 1/1 colorless Servo creature tokens.
Servo tokens you control have +3/+3, lifelink,
and are green.
4{g}, {t}: Servos you control become 5/5 Green
Bears with lifelink and "{g}{g}{g}: This creature
is unblockable until end of turn."