Master Gee the Invincible (mission)

Master Gee The Invincible is a mission to kill Master Gee The Invincible in Captain Scarlett and Her Pirate's Booty. He can only be found upon completing the DLC's main mission line, and is available for challenge after the person hosting the game has beaten the Hyperius the Invincible mission. Master Gee's mission is appropriately named "Master Gee the Invincible", and is given by Shade.

Strategy
Initially, Master Gee will not be aggressive. Players have the opportunity to assemble and plan a strategy before initiating combat. Master Gee becomes hostile when he is first attacked.

Master Gee is a fairly slow moving enemy, and most of the fight will occupy his time by chasing a Vault Hunter. He has very few attacks that he will use. His main attack is a melee attack with his fists. He will sometimes drop to a knee and then start firing his harpoons. The harpoons are slow-moving and inaccurate, but also deliver a timed but powerful explosion after impact. At the start of the battle and after every series of harpoon attacks, he will throw a tomahawk at the closest Vault Hunter, with tomahawk damage scaling up as his health depletes.

Before his shield is depleted, Master Gee is practically immune to player-controlled damage due to his shield.

Sand worms will spawn one at a time, but also at regular intervals. If a sand worm is not killed fast enough, eventually another will spawn in addition, and so on. There is no limit to the number of sand worms which can be in the arena at the same time. The sand worms here do the basic acid ball attacks, attacking more often and faster than Master Gee. If a character drops into Fight For Your Life, the worms may retreat into the ground, making it more difficult to use them for a Second Wind.

When a sand worm is killed, a fountain of light green acid will begin to flow from the hole left by the worm. The acid will begin to pool and spread, causing damage to anyone within range of the pool, Master Gee included. The damage cannot be avoided by standing on another object or jumping, nor will any damage modifiers such as Adaptive or Alkaline Shields reduce it. Certain damage-response effects, such as Shield Booster drops from Booster Shields, cannot be triggered by damage from an acid pool. If left unchecked, each acid pool will continue to spread indefinitely - reaching the edge of the arena very quickly - and multiple overlapping pools will cause increased damage stacks.

The pools of acid will continue to grow in size until either Master Gee or a Vault Hunter is close enough to the center of the pool. If either is at the center, it will slowly start to decrease in size, and if they completely remove the entire pool of acid, they will be given a permanent debuff (denoted by a syringe on the HUD). This debuff applies the base effect of the acid pool constantly to the affected combatant. This buff stacks and with greater stacks comes greater damage, and thus it is highly advisable to avoid contracting this debuff at all. The debuff is the main source of damage to Master Gee, and is key to winning the fight. The debuff lasts on the affected person until the person is defeated and respawns or until Master Gee is dead.

Getting Master Gee to absorb Sand Worms damage-over-time effects is the only way to damage his shield. Eventually, this will result in the shield being depleted, at which point Master Gee can be damaged normally. When his health reaches ~25%, Gee will stagger briefly and drop his shield module. This will create a translucent purple dome, which will provide very rapid health regeneration to any player standing inside it. However, the amount of health regeneration is not sufficient to counteract direct hits from Master Gee or his Sand Worms.

Master Gee's damage output, along with that of his Sand Worms, becomes higher as his health diminishes; as he nears death, his tomahawks will be able to do over 100,000 damage. If he downs to a knee and starts harpooning a target character, attempts to revive the downed character are likely to become a futile exercise as the explosive damage will provide a lethal hazard and knock back would-be rescuers.

The core strategy is to have Master Gee absorb and remove acid pools that exist as a result of killing Sand Worms. In order for him to absorb an acid pool, he must be near the centre of the pool, and the pool must be small. In order to keep him there, there are a few options, including:
 * 1) Singularity grenades are by far the most controlled way to lure Master Gee, with Lobbed and Longbow being superior enhancements.
 * 2) The Gunzerker's Fistful of Hurt melee override.
 * 3) The Assassin's override melee ability. Deception will usually result in Master Gee firing his harpoons after the decoy fades.
 * 4) The Commando's Sabre Turret to taunt the boss, most effective if placed in the center of the pool to draw Master Gee to it. Also of use with its nuke, albeit hard to control for directional knockback.
 * 5) If Maya can use her Phaselock with Converge just before the Sand Worm dies, Master Gee will be forced into the pool and absorb it almost immediately.
 * 6) Standing within melee range of Master Gee will cause him to stop while he uses a melee attack. Despite the strength of his ranged attacks, Master Gee's melee attacks are surprisingly weak and easy to survive.

Map Exploit
If dodging attacks later in the fight is difficult, then one can exploit the terrain and win the fight extremely easily. After getting Master Gee to fully absorb at least one acid pool, a player can simply crouch and hide behind the large rock located near the entrance, to the left as the player faces the arena. Since Master Gee continues to receive damage from the acid status effect he will eventually die without further player intervention.

Should players hide too far back and the worms start continuously burrowing and reappearing (as they do when a character is in Fight for your Life), Master Gee may disappear. His health bar will remain and the gate will still be shut, but the fight will not progress further. This can be prevented by keeping Master Gee's attention; ducking in and out of cover and firing at him to get his attention would be sufficient.