I'm not so good at building things (at least not if you want them to work or look decent), but I'm your guy for demolition. This might be why my 40-lb tool bag consists of sledges, wedges, hammers and prybars.
Here's a new tool I'm going to need: Stiletto's titanium clawbar is five times stronger than steel, and it's the young handsome King Arthur to your unpullable nail (not like the jealous old Sean Connery version). There ain't nothing it can't pull, pry, or generally smash. It's also light enough to keep my toolbag liftable - maybe I can replace a few heavier items with it.