My Soldiers Cry Out!

Cast this spell only during combat. If it is your
turn, creatures you control gain lifelink and
double strike. If it is an opponent's turn, untap
all creatures you control, and they gain indestructible until end of turn.
—
"A battle cry is more than a yell. It is a call to
arms. It is a shout of victory. It is a turning
point. It is hope."- Duncan, the Legion's Spirit