Ragnaros (Rework) by Slombeeper

Level 1:
-Sulfuras Hungers: Quest: Every time you kill a Minion with Empower Sulfuras, its damage is increased by 1, up to 30. Reward: After killing 30 Minions, increase its damage by an additional 90.
-Shifting Meteor: Each time an enemy is hit by the same Living Meteor, they take 3% increased damage from it. Quest: Hit 75 Heroes with Living Meteor. Reward: After hitting 75 Heroes with Living Meteor, its duration is increased to 2.25 seconds, and the Ability can be recast to change its direction once per cast.
-Engulfing Flame: Increase Blast Wave's movement speed bonus to 35% and its radius by 15%.

Level 4:
-Fire Ward: When Living Meteor hits an Enemy Hero, you gain a charge of Spell Block, reducing damage from the next enemy Ability against you by 50%. Can hold up to 2 charges.
-Slow Burn: Blast Wave deals 50% additional damage over 4 seconds and slows enemies hit by 30% for 2 seconds.
-Catching Fire: (Active) Quest: Gathering a Regeneration Globe increases Ragnaros' Health Regeneration by 1.25 per second, up to 22.5. Reward: After gathering 15 Regeneration Globes, activate Catching Fire to gain 25 Armor for 3 seconds, reducing damage taken by 25%.

Level 7:
-Hand of Ragnaros: If Empower Sulfuras hits at least 2 enemy Heroes, it restores 10 Mana and its cooldown is reduced by 2 seconds.
-Molten Power: Each enemy hero hit by Living Meteor increases the damage of your next Living Meteor by 20% and reduces its cooldown by 1.5 seconds, up to a maximum of 5 times.
-Blistering Attacks: Every 10 seconds, your next Basic Attack deals 50% additional damage. Hitting enemies with Basic Abilities reduces this cooldown by 1.5 seconds.

Level 10:
-Sulfuras Smash
-Lava Wave

Level 13:
-Cauterize Wounds: Empower Sulfuras heals for an additional 40% of damage dealt to Heroes over 2 seconds.
-Tempered Flame: When Blast Wave or Living Meteor damages an enemy Hero, you gain a Shield equal to 75% of the damage dealt for 6 seconds.
-Resilient Flame: Passive: When Ragnaros is Stunned, he gains 50 Armor for 3 seconds, reducing damage taken by 50%. This effect has 15 second cooldown.

Level 16:
-Giant Scorcher: Empower Sulfuras burns enemy Heroes for 9% of their maximum Health over 3 seconds. This additional damage does not heal you.
-Meteor Bomb: Living Meteor deals 25% less damage but explodes at the end of its path, dealing 220 damage (+4% per level) to all nearby enemies. Living Meteor gains an additional charge and costs 10 less mana.
-Blast Echo: After Blast Wave explodes, cast another Blast Wave on yourself. Can only occur once per cast. Hitting enemy heroes with Blast Wave reduces its cooldown by 1 seconds.

Level 20:
-Flames of Sulfuron: Increase the stun time of Sulfuras Smash by 1 second. Hitting enemy heroes with Empower Sulfuras reduces the cooldown of Sulfuras Smash by 2 seconds.
-Lava Surge: Reduce the cooldown of Lava Wave by 30 seconds and it gains an additional charge.
-Heroic Difficulty: Increase your Health and damage by 20% while in Molten Core, its cooldown is reduced by 40 seconds and its cast range is increased by 150%.
-Submerge: Cooldown: 90 seconds. Activate to place yourself in stasis and heal for 650 Health (+4% per level) over 3 seconds.

Red = Removed talent or functionality.
Orange = Added new talent or functionality.
Blue = Changed statistic.

Note that these are only the changed talents:

Level 1:
-Engulfing Flame: Increase Blast Wave's damage by 75%, Increase Blast Wave's movement speed bonus to 35% and its radius by 15%.

Level 4:
-Slow Burn: Blast Wave deals 50% additional damage over 4 seconds and slows enemies hit by 30% for 2 seconds.

Level 7:
-Molten Power: Each enemy hero hit by Living Meteor increases the damage of your next Living Meteor by 20% and reduces its cooldown by 1.5 seconds, up to a maximum of 5 times.
-Blistering Attacks: Every 10 seconds, your next Basic Attack deals 50% additional damage. Hitting enemies with Basic Abilities reduces this cooldown by 1.5 seconds.

Level 13:
-Tempered Flame: When Blast Wave or Living Meteor damages an enemy Hero, you gain a Shield equal to 75% of the damage dealt for 6 seconds.
-Resilient Flame: Passive: When Ragnaros is Stunned, he gains 50 Armor for 3 seconds, reducing damage taken by 50%. This effect has 15 second cooldown.

Level 16:
-Meteor Bomb: Living Meteor deals 25% less damage but explodes at the end of its path, dealing 220 damage (+4% per level) to all nearby enemies. Living Meteor gains an additional charge and costs 10 less mana.
-Blast Echo: After Blast Wave explodes, cast another Blast Wave on yourself. Can only occur once per cast. Hitting enemy heroes with Blast Wave reduces its cooldown by 1 seconds.

Level 20:
-Flames of Sulfuron: Sulfuras Smash slows enemies by 50% for 2 seconds. Enemies hit by the center of Sulfuras Smash are stunned for 1 additional second. Hitting enemy heroes with Empower Sulfuras reduces the cooldown of Sulfuras Smash by 2 seconds.
-Heroic Difficulty: Increase your Health and damage by 20% while in Molten Core, its cooldown is reduced by 40 seconds and its cast range is increased by 150%.
-Submerge: Cooldown: 90 seconds. Activate to place yourself in stasis and heal for 650 Health (+4% per level) over 3 seconds.