Ruby SwordThe Ruby Sword does 10 attack damage with a normal 1.6 attack speed, and gives you a large boost in combat when you're on fire.
When you're on fire, it gives you the strength effect for 25 seconds, as well as "bleeding", which means if you hit someone while you're on fire, it'll do half a heart of damage every second to your victim. In order to craft it, look up the recipe in the recipe book!