When I was using the obsidian blade, it dealt 0 damage to anything I fought with it. Also, when fighting Teleri,  I poisoned her, but when her HP gauge was at 0, I didn't win the fight, but had to continue on and I couldn't end the fight til I inevitable lost.

Ahhh, Teleri is ice-based, and Obsidian is as well, so she's invulnerable to all ice damage. I'm going to change the description for both enemies and weapons so that it's easier to see. I'll check up on the HP 0 gauge as well (Poison isn't suppose to kill, just remove HP until you can deliver the blow, but I'll check if there's a workaround as this was the default for the system).