The Lawbringer

Equip creature {5}
Equipped creature has +4/+1, menace, vigilance, double strike, and breakthrough
(If equipped creature were to survive a fight, it
may perform another attack).
The Lawbringer was a secret Azorius weapon meant to destroy any hordes threatening Ravnica, and fast.
Only one was made before the weapon became banned
on the grounds of being inhumane.