You are a cheater now
Your only option is to build a giant pyramid out of precious metals and kick your cheaty dorfs down a shaft in the middle making them fall 30+ level onto a pit of spikes. The spike room must be filled with wild badgers that feast on the flesh of the cheaty (now splattered) dorfs forever banishing their vile spirits from the mortal plane.
Or thus be forever labeled a dirty cheater in my big book of DF players.
This also counts as a sacrifice to the blood god... So two in one there.