Ardreth, Swordman of Hate

Ardreth, Swordman of Hate enters the battlefield
with 2 Ritual counters and Haste.
When Ardreth, Sword of Hate enters the battlefield all creatures you own get -1/+0.
Ardreth, Swordman of Hate gets +1/+0 for each creature with a -1/+0 counter.
When Ardreth, Sword of Hate runs out of Ritual counters it dies.
{3}: Add a Ritual counter, can be activated once
per turn