Numberless Graves in your Kingdom gives you one money per turn plus near limitless card draw mid to late game. Lord of the Dead on big nasty necromancy units in your discard. Raise Dead on your Blood Dragon Knights in discard...combine warpstone experiments with that unit to destroy nasty opposing units at a glance. Swarm of Bats to infinity and beyond! A late game Abyssal Terror can run over everything in front of it.  Use necromancy as much as possible to try to avoid decking yourself which is a huge danger.