Abilities:

• Magma Spit - Inflicts 45K fire damage to enemy targets when no one is in melee range, triggers Molten Tantrum
• Molten Tantrum - Goes into a frenzy, increases fire damage dealt by 100%, stacks to 10
• Mangle - Deals 120K damage every 5 seconds, target will be mangled lifeless after 30 seconds, used on current tank
• Lava Spew - Deals 34K fire damage per second for 3 seconds to all players within 60 yards
• Ignition - Ignites the ground in multiple directions causing 25K fire damage per second
• Pillar of Flame - Hurls at enemy blasting them for 25K fire damage and sunders the ground, which after some seconds deals 120K fire damage and knocks back all enemies near the sundered ground
• Parasitic Infection - Deals 13K damage every 2 seconds, triggers Infectious Vomit after 10 seconds
• Infectious Vomit - Deals 40K damage to all allies within 8 yards and expels lava parasites
• Constricting Chains - Encases Magmaw in chains dealing 20K physical damage per second and stunning target for 5 seconds
• Point of Vulnerability - Tender backside of Magmaw's head is exposed, damage dealt to this area increased by 100%, health is shared by head and body

Notes:

• It's a Lava Worm sticking out of the lava
• Must be tanked (someone in melee range) or big fireballs will wipe the raid
• Tank facing it one side while raid on the other to avoid breath attacks
• The Pillar of Flame is a meteor to avoid not to stand under, but then spawns the Lava Parasites where OT picks up and you aoe kill
• If not picked up quickly, they start Parasitic Infection the raid which chain reactions creating more Parasites
• Lava Spew is channeld raid wide damage, nothing but heal through it and use CDs
• Ignition basically lights up half the room with fire so just move out of it
• Occasionally, he will slump forward on the ground allowing 3 players(2 in 10man) to hop on (vehicle wise)
• Use the Constricting Chains to pin Magmaw down, it'll take 3(2 in 10man) of you to do it as he'll break free out of one
• Once pinned, he will have Point of Vulnerability so dps CDs away and burn his head
• Rinse and Repeat
• Heroic:  Nefarian spawns some Blazing Skeletons to deal with