Blade of Betrayal

Whenever equipped creature attacks, you
may sacrifice a creature. If you do, equipped creature gets +1/+1 until end of turn.
Equip - pay 3 life
"There is no cost too great, there is nothing I wouldn't sacrifice. For my ambition is greater than you. The echoes of my deeds will be heard even through the whorl of oblivion, I will stand resonant throughout eternity. For this is my destiny."