The Grotesque Guardians are gargoyle slayer bosses that reside at the top of the Slayer Tower.
A player fights the Grotesque Guardians on the Slayer Tower’s roof.
In order to access and fight them, the player must be assigned gargoyles as a Slayer task or be assigned a Grotesque Guardians boss task. Prior to this, the player must also obtain a brittle key to unlock the gate leading to the bosses. This key can only be dropped on task and has a drop rate of 1/150 from normal and marble gargoyles.
As with all other gargoyles, players must bring a rock hammer, granite hammer, or rock thrownhammer to finish them off.
Requirements
75 and a Gargoyle slayer task
Completion of Priest in Peril to access Morytania
A Rock hammer or thrownhammer
Unlocked the Slayer tower rooftop with a Brittle key
Suggested skills
75+
75+
70+
75+
75+
70+ for Piety, (74+ for Rigour)
Mechanics
Attack Styles
During phases 1-3, Dusk performs a simple slash-based attack consisting of a swipe with his left arm, dealing up to 15 damage if not protected against; activating Protect from Melee reduces the damage by 80%.
Dawn performs a simple ranged and melee attack:
The ranged attack deals two separate hits, both with a max hit of 9 if not protected against.
The melee attack consists of a simple kick that deals up to 15 damage if not protected against.
Damage Immunity
During phases 1 and 3, Dusk’s intact stone wing protects him from all types of damage. In phases 2 and 4, he can only be harmed with melee attacks.
As Dawn is flying above the ground, she can only be harmed with ranged or magic attacks.
Stone Ball
During phases 1 and 3, Dawn will fire a stone ball around the player’s position.
The ball has a 3×3 AoE (1 tile from the centre).
If struck by the ball, the player will become encased in stone, similar to the marble gargoyle’s special attack, which essentially acts as a stun for 5 seconds and deals up to 15 damage.
Trample
During phases 2 and 4, standing underneath Dusk may prompt him to trample the player for 30-40 damage.
Blinding knockback
During phase 2, Dusk will begin charging an attack, indicated by him covering his face and starting to glow.
Standing next to Dusk during this will cause the player to be knocked back and dealt damage in the high 20s.
The knockback animation essentially stuns the player for a few seconds, and can lead to getting comboed with the rockfall mechanic.
Rockfall
During phase 2, Dawn will cause rocks to fall down upon various spots in the area, indicated by shadows on the floor. Standing within a 3×3 area around the impact will inflict up to 22 damage and stun the player.
Getting hit while under Dusk can lead to being trampled for massive damage, thus it is highly recommended to not walk through him to dodge this mechanic.
Lightning Strike
During the transition to phase 3, Dawn and Dusk will stand on the west and east sides of the rooftop and discharge electrical bolts onto the ground.
This is indicated with blue circles for Dawn, and orange for Dusk.
The vortices have a 3×3 AoE (1 tile from the centre), dealing anywhere from 5-10 damage per tick regardless if the player is directly on or adjacent to one. There is a one-second warning frame indicated with a vortex of the respective colour before the player starts taking damage. One of these vortices will always target the player’s position when the mechanic initiates.
The vortices spawn anywhere on the rooftop. They do not stack on each other, and up to three circles may be in close proximity to each other.
Equipment
During the fight, players will need both a ranged weapon and a melee weapon, plus a rock hammer, granite hammer, or rock thrownhammer to deal the final blow. An eternal slayer ring is highly recommended for fairly quick banking and access to the bosses.
Slot
Recommended equipment for Melee – Item (most effective → least effective)
75 and a Gargoyle slayer task
rock hammer, 
granite hammer, or 
rock thrownhammer to deal the final blow. An eternal slayer ring is highly recommended for fairly quick banking and access to the bosses.
Slayer helmet (i)
Black mask (i)
Slayer helmet
Black mask
Amulet of rancour
Amulet of torture
Amulet of fury /
Amulet of blood fury
Amulet of glory
Amulet of strength
Infernal cape
Fire cape
Ranging cape(t)
Torva platebody
Bandos chestplate
Blood moon chestplate / 
Fighter torso
Obsidian platebody / 
Eclipse moon chestplate
Black d’hide body
Torva platelegs
Bandos tassets > 
Blood moon tassets
Obsidian platelegs / 
Eclipse moon tassets
Verac’s plateskirt
Dragon platelegs
Scythe of vitur
Soulreaper axe[a] /
Ghrazi rapier /
Blade of saeldor /
Inquisitor’s mace
Noxious halberd /
Abyssal tentacle
Osmumten’s fang /
Abyssal whip /
Abyssal bludgeon
Zamorakian hasta >
Dragon scimitar
Avernic defender
Dragon defender
Dragonfire shield
Ferocious gloves
Barrows gloves
Dragon gloves
Rune gloves
Primordial boots
Dragon boots /
Aranea boots[b]
Echo boots /
Guardian boots
Rune boots / 
Mixed hide boots
Climbing boots
Ultor ring
Bellator ring[c]/
Berserker ring (i) /
Lightbearer[d]
Brimstone ring
Ring of suffering (ri) /
Archers ring (i)
Treasonous ring (i) /
Warrior ring (i) /
Tyrannical ring (i)[e]
Dragon claws >
Burning claws
Dragon dagger(p++)
Toxic blowpipe
Saradomin godsword
Crystal halberd
