Quote from ryansaxe »
You activate the claw. With the trigger on the stack, you can sacrifice it to engineer. You will still get the tutor, but your opponent will not gain control of the claw.
Quote from steve_man »
I'd argue that this is equal, if not slightly better than Gravecrawler. Lots of context, but there aren't a ton of zombies for Gravecrawler to be too reliable.