He Who Was Slain

He Who Was Slain can be your commander.
{t}: Add {w}{r}{g} to your mana pool.
{t}, {3}{u}{b}: Put a -1/-1 counter on each creature
your opponents control. Draw a card for each
creature that would die this way.
A reminder of the infamy that was done to the North,
a promise of revenge against all who perjured.