If you feel a bit underpowered for taking on these guys, wait in the starting area for them to pop up. You only need to tap them, and the guards will help you take them down.
Their Lava Shower is quite lethal, but pay attention and you can stay out of it easily. They spray it around themselves at a fixed distance (to strike whoever they're attacking) for 180 degrees. So in melee you can run behind them and escape it (they turn at about the rate it takes to run around them), and at range, you'll likely have to move a bit closer or further away to escape the shower.
Quest
Breach in the Defenses
Quest facts and objectives from the current retail game data.
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
If you stand on the mob you will usually avoid the aoe.
Breach in the Defenses http://www.youtube.com/watch?v=6OB6TpRDqyc
That is every comment on this page.
At a glance
Breach in the Defenses is a quest for level 32-35. It rewards 1 reputation reward, 4,800 experience and money.
Quest facts
The client quest POI data records no map location for this quest, so no map is shown.
Check whether you have already completed this quest
in-game: /run print(C_QuestLog.IsQuestFlaggedCompleted(29137))
Requirements
Read from the Blizzard quest API.
Description
Lava worms are bursting through the ground behind our lines, breaking our formations and allowing elementals to slip through. You'll find them scattered throughout our entire front to the north, and upon the Ashen Fields further out. Stomp them back into their holes.
Community notes from Wowhead · 3 comments
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Reward details
Reputation: Guardians of Hyjal +250
Faced with the impending devastation of Mount Hyjal, the most powerful members of the Cenarion Circle have joined forces with their Emerald Dragonflight allies to fend off Ragnaros' elemental hordes and the Twilight's Hammer.
Reputation group: Cataclysm.
Currency: Mark of the World Tree x 2
Granted by the Guardians of Hyjal. Can be used to purchase reinforcements for the Invasion of the Firelands.
Item facts are the current retail client’s (ItemSparse); the specialisations for a pick-one item are the ones the Blizzard quest API lists; faction and currency text is the client’s own. Lowest listed price = the US commodity auction house now.
Where this quest fits
Other quests with this name
This one: Level 32-35.
Steps, storylines and map placement from the client’s QuestLine, prerequisite and QuestPOI data; neighbouring quest text is Blizzard’s own (quest API), shortened to its opening sentences.