Ragnaros!

I just solo'd Molten Core...

I mean, it was definitely doable back in Wrath with decent gear, but its fairly easy now.

This isn't the best writing here, but I just wanna say that its good fun. I mean, a couple hundred gold for a couple hours, some potentially pretty epics. AND a small chance at getting some legendary items.

Anyways, I would say to look out for Baron Geddon and Ragnaros because both of them have abilities that toss you way up and you can take significant damage from falling. In fact, over 30% of the damage I took throughout the whole instance was from falling.

Anyways. Fun place. Good times. T1, T2 pants, and a chance at Thunderfury.