Filmed with Fraps@60FPS
Songs:
1. R.E.D - 8STYLE (SOUND HOLIC)
2. Mystic Mistiness - 8STYLE (SOUND HOLIC)
3. Gates of Hell - Bach (THOUSAND LEAVES)

This boss was actually very fun.

There are a few important things to know on this fight. Positioning, Feint, CD management, and add control.

New stuff on Heroic:

Horridon now has a new ability called Dire Call. Dire Call does moderate AoE damage and will summon a Direhorn Spirit that will fixate on a raid member for the entire duration of the fight.

The Direhorn Spirit cannot really be killed so it is best to just keep your distance. Additionally any damage dealt to the Spirit will knock it back. Keeping distance is not difficult due to the fact that the Direhorn love to role play his way to you.

Old stuff, but more dangerous:

Triple Puncture: Horridon cast this periodically on his target dealing around 50k damage with each subsequent cast having it's damage increased by 10%. I'm not entirely sure if this is verified that Feint reduces the damage but there's no harm in doing it.

Adds: Kill them all with cleave; they can become very overwhelming adding a lot of unnecessary damage.

Direhorn Dinomancer: When this add has spawned, quickly dispatch of it and clear out most of the adds and then use the Orb of Control.

Strat:

Blow all offensive CDs on the pull EXCEPT for Drums of Fury. Save it for the last strech.

Farraki Door: No real need to re-position Horridon much for this door, let them come to you. Focus down the Wastewalker adds and kill the rest via Blade Flurry/Crimson Tempest. Once the Dinomancer has spawned kill him and use the Orb to control Horridon.

Use the time while Horridon is stunned to finish of remaining adds and reapply Recuperate.

Gurubashi Door: Re-position in front of the door. Kill the Venom Priests to prevent them from summoning Essences. Cleave down the others.

Drakkari Door: Re-position to the right of the door. All of the adds from this door are obnoxious, kill the Risen Warrior first, followed by the Frozen Warlord.

*DO NOT PUSH HORRIDON to 30% until you have full cleared the Drakkari Door of all adds and the Dinomancer+Orb.

Once you have stunned Horridon for the 3rd time re-position to the entrance (Furthest distance from War God Ja'lak) and burn Horridon Hard with War Drums+CDs if they're active or coming up soon. It's important to also have both Evasions at this point in order to keep the risk of dying very low.

Tips: If you have the Mirror of the Blademaster trinket, wait for the War God to approach and then use it. The Mirror Images will tank the War God for a maximum of 20 seconds.

Save Defensive CDs for when there are adds out in order to minimize both Horridon and add damage.