Obor the hill titan is a new boss that Jagex added for the F2P (free to play, or people who don’t pay for the membership). He resides in a small room on the other side of the gates located on the west wall of the hill giant area under Varrock.
To gain access to Obor, you must kill hill giants until one of them drops a “giant key.” This will permit you to kill Obor one time.
When you enter the lair, you will be in a small room. This is where you prepare to fight Obor by drinking a combat boosting potion (range, magic, or melee type potions such as strength and attack), and you can also turn on a protection prayer.
Once you are ready, climb down the rocks and he will immediately attack you. He attacks with both range and melee. Once he is dead, you can receive a number of items such as rune armor, herbs, limpwurt roots, runes, and much more. My favorite drop is the hill giant club, but I haven’t gotten that one yet.
My overall opinion is that it’s not really a boss that benefits me because I’m such an established member that the drops aren’t worth camping out in hill giants. I’m more of a Wintertodt-Zulrah boss girl. However, I can see the benefits for F2P players, especially if they are iron man players because F2P iron man can’t get full rune armor otherwise. As well as the money benefits since he drops a lot of roots, runes, and rune armor.
My method for defeating him is melee. I use my god sword, or a dragon scimitar, and my bandos rune armor (because he’s pretty easy so you don’t need anything fancy). Then once I’m in the small room I like to take a dose of my strength potion and attack potion and turn my protect from range on (because it does more damage than his melee attacks). I usually don’t use more than two sharks for food unless I’m not paying attention, and I also have him defeated within less than thirty seconds.
If you are a F2P and don’t have access to the weapons and armor I just listed, regular adamant or rune armor is fine for killing him. In fact, I’m pretty sure you could defeat him in mithril and even steel. Use a scimitar or maybe a two-handed sword. Bring lobsters and swordfish as your food, and a strength potion.