Tethered Butcher

Whenever Tethered Butcher attacks, unless you
pay {3}, it doesn't untap during its controller's
next untap step.
As long as there are seven or more creatures in graveyards, Tethered Butcher has "Whenever a creature dealt damage by Tethered Butcher this
turn dies, put a +1/+1 counter on Tethered
Butcher."