Nameless Executioner

First strike, Deathtouch
{6},{t}: Destroy target creature with power or toughness greater than 5.
When Nameless Executioner enters the battlefield destroy target creature.
If a creature with power or toughness greater than 5 leaves the battlefield, place two +1/+1 counters on Nameless Executioner
The Nameless Executioner absorbs the life force of all those who he slays, and stores them in the jewels on his blade.