The Glacial Abyss Watcher is one of the five "Watchers of the Netherrealm". You must defeat Watchers to collect boss keys and challenge the Traveler, one of the pinnacle bosses. The Watchers of the Netherrealm are harder than typical Beacon Bosses. The difficulty of the Watcher is based on which Timemark you are attempting.
In order to fight the Glacial Abyss Watcher, you have to collect Starshards by completing Netherrealm stages or trading with other players. Watchers have specific loot tables. Chaos Invasion Card Inheritance does not affect the Watcher's fight or loot table in any way. You can learn more about their loot tables by selecting the boss in-game.
Rewards
All The Watchers of the Netherrealm have a pool of exclusive Legendries and Precise Skills that can drop, this makes some Watchers more valuable than others. Watchers can also award various currencies, Memory Cards, Beacons, and items from the global drop pool. Farming Watchers is a great way to accumulate keys to take on the Traveler at your current Timemark.
Skill Breakdown
The Glacial Abyss Watcher can generate roaming Frost Orbs throughout the fight, these deal moderate damage over time in a small area. Frost orbs do not expire until the fight is over. Avoid taking damage by moving out of the Frost Orbs' Path.
The Glacial Abyss Watcher slams it's tail into the ice, dealing cataclysmic damage in an area in front of the Watcher. Do not be directly in front of the Watcher when this attack lands.
The Glacial Abyss Watcher slashes it's talons in a quick dash attack. This ability deals substantial damage in a large radius with only a small windup time. Avoid it by being behind the boss.
The Glacial Abyss Watcher executes a frontal cleave with mediocre damage. This ability is enhanced with added effects after the first Flight Phase.
The Glacial Abyss Watcher channels Frost Breath in a massive cone in front of them dealing moderate damage over time. This ability covers a large area in front of the Watcher, avoid damage by being behind or aside the watcher.
At 75%, 50% and 25% HP remaining, the Watcher flies into the air and creates 3 gigantic Ice Waves that deal cataclysmic damage over time on contact. Ice Waves are formed at random edges of the arena that quickly travel to the location you were in when they formed. Avoid this by staying in the center of the arena to give yourself time to evade the encroaching Ice Waves. Have a mobility skill ready to help dodge the Waves.
The Glacial Abyss Watcher executes a frontal cleave with mediocre damage. This ability generates several Ice Waves in front of the Watcher that deal medium contact damage, they attempt to track you with a poor turning radius and have a limited lifetime. Avoid the cleave and the Ice Waves by standing behind the Watcher.
This enhanced ability can be used by the Watcher after the first Flight Phase.
The Glacial Abyss Watcher executes a frontal cleave with mediocre damage. This ability scatters lingering Ice Mines that explode after a short delay when stepped on, dealing poor damage in a small area. Avoid the cleave by standing behind the Watcher, and feel free to intentionally detonate Ice Mines to prevent them from becoming a problem later.
This enhanced ability can be used by the Watcher after the first Flight Phase.
The Glacial Abyss Watcher winds up it's spiked tail before swiftly slashing a large radius around it, dealing mediocre damage. This is one of few abilities that cannot be avoided by simply standing behind the watcher, the only way to avoid damage is to run away. This ability is enhanced with added effects after the first Flight Phase.
The Glacial Abyss Watcher winds up it's spiked tail for a longer period of time before swiftly slashing a large radius around it, dealing mediocre damage. This ability creates 3 Ice Waves that spiral away from the Watcher and then back to it, dealing moderate damage on contact. Avoid taking damage by running away from the Watcher while paying mind to the Ice Waves' predictable path.
This enhanced ability can be used by the Watcher after the first Flight Phase.
The Glacial Abyss Watcher winds up it's spiked tail for a longer period of time before swiftly slashing a large radius around it, dealing mediocre damage. This ability scatters lingering Ice Mines that explode after a short delay when stepped on, dealing poor damage in a small area. Avoid taking damage by running away from the Watcher, and feel free to intentionally detonate Ice Mines to prevent them from becoming a problem later.
This enhanced ability can be used by the Watcher after the first Flight Phase.
The Glacial Abyss Watcher thrusts it's tail into the ice below, dealing notable damage in a small area. This ability generates two Ice Waves that deal moderate contact damage as they travel forwards. Avoid taking damage by standing a distance behind the Watcher.
Glacial Abyss Watcher Mechanics
The Glacial Abyss Watcher begins the encounter in the sky, monologuing you. After a few moments, Frost Orbs are dropped near the center of the Arena. Shortly after, the Watcher lands at a random point in the Arena's outskirts and the fight begins. Many of the Glacial Watcher's attacks can be avoided by simply standing behind it, with Spin Attack and it's enhanced variants being the exception.
The Glacial Abyss Watcher randomly rotates through all of it's abilities while directly engaging you. The enhanced Cleave and Spin Attack abilities replace the standard form after the first transitional Flight Phase. All of this Watcher's abilities deal Cold damage, having maxed out Cold resistance is recommended.
Transition (Flight Phase)
At 75%, 50% and 25% HP remaining, the Watcher flies into the air and creates 3 gigantic Ice Waves that deal cataclysmic damage over time on contact. Ice Waves are formed at random edges of the arena that quickly travel to the location you were in when they formed. Avoid this by staying in the center of the arena to give yourself time to evade the encroaching Ice Waves. Have a mobility skill ready to help dodge the Waves.
Note: Flight Phase can be bypassed with very high DPS, leading to a very quick fight.
Video Guide
Summary
Complete Netherrealm stages to gain enough stage attention to fight The Glacial Abyss Watcher.
The Watchers of the Netherrealm have a pool of exclusive Legendries that they can drop.
Having maxed Cold Resistance is highly recommended.
The Glacial Abyss Watcher has 2 key phases. Dodge its basic patterns during the Boss Phase, and avoid the Ice Waves during the flight phase.