Tears of Rage
{2}{R}{R}
Instant
Cast ~this~ only during the declare attackers step.
Attacking creatures you control get +X/+0 until end of turn, where X is the number of attacking creatures. Sacrifice those creatures at the beginning of the next end step.
Wake the Dead
{X}{B}{B}
Instant
Cast ~this~ only during combat on an opponent's turn.
Return X target creature cards from your graveyard to the battlefield. Sacrifice those creatures at the beginning of the next end step.