For a little more challenge and exclusive mounts, you'll want to tackle Extreme Trials
How to Unlock Extreme Trials in Dawntrail 7.0 – FFXIV
Final Fantasy 14 has tons of fights of varying difficulty, including extreme trials, which are easier than wild raids, but harder than the story trials players will encounter.
[Ed. note: This guide has been updated with the Dawntrail extreme trials, but outside of where you can unlock them, there are no further spoilers on this page.]
Below we explain everything you need to know about Extreme Trials in FFXIV, as well as where you can unlock each Extreme Trial version in each expansion.