The Molten Front is a part of the Firelands, and thus part of Ragnaross domain. Summoned during the War of the Three Hammers hundreds of years ago and left essentially imprisoned deep within Blackrock Mountain. During this time the mightiest of his loyal followers fought over control of the Firelands. Ragnaros was eventually confronted and banished from the Molten Core, sent back to his elemental plane of fire. Once there, he swiftly regained control of the Firelands, finding an ally in both the newly emerged Deathwing and the traitor, Fandral Staghelm. With these new allies and the weakening of the walls between worlds, Ragnaros has built a savage army, intending to burn down Mount Hyjal and the World Tree, then spread his flames across all of Azeroth.
Malfurion Stormrage stands in his way, together with other notable heroes, such as Hamuul Runetotem. With the help of able adventurers, the Druids of the Talon, and the Guardians of Hyjal, as well as resurrected demigods, have successfully halted his advance within Hyjal and are seeking to push back against his forces. With the Firelands successfully breached, Malfurion and his allies use the Molten Front as a staging ground to launch their attacks against Ragnaros, gaining more ground with each surge, ultimately attempting to plant a tree of life within his fiery domain.
The Molten Front reflects the entirety of the Firelands. It is a land full of flame and lava pools, with ash floating through the air and fire hawks streaking overhead in sheets of flame. The fire hawks roost on the largest floating mountain, Fireplume Peak, their eggs nestled in spitting lava pools. Near the Peak is the Furnace, a hill laced with deadly flames, beneath which are the twisting, winding caverns of the Molten Flow. On the eastern side of the Front rise large basalt columns, which native spiders use as their lair.
Players must have completed the introductory quests listed below before the portal becomes available. The portal is located atop Nordune Ridge[27.3, 55.7]
in Mount Hyjal and is the only way to access the Molten Front.
The biggest character players will come across is Malfurion Stormrage, though there are several notables. Essentially every major player involved in the introductory quests leading into the Front are present, depending on what players have unlocked, including Commander Jarod Shadowsong, Thisalee Crow, Choluna, Skylord Omnuron and a host of others.
These are the introductory quests that will grant access to the zone, not including Mount Hyjal required quests up through Aessina's Miracle. For quests after, see above link.
Molten Front
Fire elemental
Molten giant
Edit
[Crystalline Tear of Loyalty].
In-game
Patch 4.2.0 (28-June-2011): Added. 
World of Warcraft Community Site (US) Dev Watercooler: Content for the Casual 85 by Dave "Fargo" Kosak, Jun 7, 2011 6:16 PM PDT
MMO-Champion Firelands Daily Area Preview, Blizzard Anniversary Video, MMO Report, Comics 2011-03-08 07:40 AM
