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This writeup is intended to be mobile-friendly as the UI can make switching difficult. Thus, there will be a focus on limiting the amount of switching necessary, from gear to prayers. Using a web browser or PC will help, as you will be able to swap gear much faster, but is not required. Using a PC will allow you to switch prayers, gear, or spells to optimize DPS, but these will not be discussed in depth.
Event Mechanics
Event mechanics are explained on the Impending Darkness Event page. In summary, you will need to clear 4 
Slayer areas a total of 5 times to complete the entire event. At the end of every area cleared, a harder Boss monster will spawn - it is simply a regular monster with extra combat modifiers. At the end of every round of 4 slayer areas cleared, 
Bane will spawn. You will have time to swap gear before starting the fight with Bane.
Equipment Sets
Unhallowed Wasteland, 100% Slayer Negation Sets
This is the most important set and is targeted for 
Unhallowed Wasteland. You can use this set for the remaining Slayer areas, but it will be helpful to swap to the other sets to optimize your damage output.
Dark Waters, 40% Slayer Negation Sets
This set is targeted for 
Dark Waters, 
Shrouded Badlands, and 
Perilous Peaks. If you choose the "Slayer Area Effects are 5% Stronger" Modifier, wear a 
Hunter's Ring in the Passive Slot for all 3 styles.
Bane, 0% Slayer Negation Sets
This set is targeted for Bane, here we remove all extraneous Slayer Area negation as we want maximum damage reduction and damage output. Remember that the game pauses before you fight Bane, so you do not need multiple copies of 
FEZ.
Equipment Choices
The 
Maximum Skillcape is non-negotiable, as fights take place in Slayer areas with an item requirement to enter. Taking the cape off in the middle of an area, for example during the pause before Bane, will cause all of your attacks to miss.
Shield of Melee Power, 
Shield of Ranged Power, and 
Shield of Magic Power should be equipped as soon as they are obtained.
Buffs
Agility
Potions
Diamond Luck Potions or 
Damage Reduction Potion IV for the entire event.
Astrology
Maximize combat-focused 
Astrology bonuses. However, the difference is relatively small, so don't focus on getting optimal bonuses.
Modifier Tier List
Listed from best (choose it) to worse (avoid it). All modifiers apply to the enemies, not the player. You can start and stop the event when beginning to fish for a decent first modifier. If you receive choices of modifiers or a series of modifiers after a few rounds that are completely awful, you can always restart the event for better RNG.
- +100% chance to ignore Stuns and Freezes and Immune to Sleep
- +20% Maximum Hit and -10% Maximum Hitpoints
- +20% Maximum Hit and +20% Accuracy Rating
- +2000 Maximum Hitpoints and -10% Maximum Hit
- +50% chance to apply poison when hitting with an attack and +10% Maximum Hitpoints
- +15% Damage Reduction and +15% Global Evasion
- +50% Chance to apply burn when attacking and +50% chance to apply frostburn when attacking
- +100% chance to ignore Slow effects and -5% Attack Interval
- +10% Maximum Hit, -10% Attack Interval, and -10% Global Evasion
- +15% chance to apply affliction when attacking and +15% Lifesteal
- Slayer Area Effects are 5% Stronger
- Heal 4% of current hitpoints every 2 turns and +40% of Maximum Hit added to Minimum Hit
Area Order
The recommended order of areas to clear is as follows:
- Unhallowed Wasteland:
- Wear the Slayer Negation sets outlined above, this is mandatory, as the area effect is extremely detrimental to your ability to kill anything.
- Dark Waters:
- Wear the Dark Waters 40% negation sets outlined above, if you choose the "Slayer Area Effects are 5% Stronger" Modifier, wear a Hunter's Ring in the Passive Slot.
- Shrouded Badlands:
- No additional Area Negation is required anymore, Maximum Skillcape is enough to mostly cover the accuracy loss and the enemies aren't difficult enough to warrant.
- Perilous Peaks:
- Same as above, no Area Negation is required. When fighting Bane you use
Protect from depending on which Combat Style Bane is using, so the Area effect (-Evasion) does not matter since the prayer sets the boss' chance to hit to 20% regardless.
You can clear in any order you wish, but the recommended order minimizes gear swaps and optimizes Bane fight locations. It is strongly recommended to never clear Unhallowed Wasteland and Dark Waters last.
Fight Details
Prayers
Prayer choice is different for each Slayer area. Prayers are listed in priority order and are recommended this way to reduce the need to change them on mobile as it can be difficult given the UI.
Prayers for Bane fights will be Protect from combat style and Battleheart.
Eating Patterns
Impending Darkness Event takes more attention than 
Into the Mist. High healing food such as 
Whale (Perfect) is highly recommended. Pay attention to all attacks throughout the event, and eat to full whenever in doubt. Listed below are the high priority monsters and attacks to watch out for.
| Monster |
Attack |
Notes
|
 Rokken/Rokken Boss |
Shockwave |
Modifiers can make Rokken hurt, and a boss Rokken will be very fast. Eat to full.
|
 Ku-tul |
Curse of the Deep |
If you don't switch to god armor, modifiers + affliction can make this hit hard, since Ranged has no DR amulet. Eat to full.
|
 Greater Skeletal Dragon |
Bone Crush |
Being stunned by a Bone Crush, the -10% DR debuff from Spiked Tail Whip, affliction stacks, plus any additional modifiers makes this pretty dangerous. If you have full debuffs (stun, -10% DR), Eat to full.
|
 Spiked Red Claw |
Savage Spike |
If you're bleeding, Eat to full.
|
| Bane, Bane, Instrument of Fear |
Suffocate |
Eat at around 60% HP or earlier. You want to avoid the sleep completely.
|
| Bane, Bane, Instrument of Fear |
Fragile Mind |
If you are debuffed by Fragile Mind, Eat to full.
|
| Bane, Instrument of Fear |
Overwhelming Power |
Spam eat.
|
Area Fights
These notes are strictly for the monsters in each area. 
Fire Surge is the recommended spell. 
Anguish III and 
Surge II are not required but do provide better DPS; however, they will have to be selected every time you swap to your 
Magic set.
Bane Fights
Bane's attack style randomly rolls when he spawns. Similar to Into the Mist, you must fight him with the same combat style he is using, as he is immune to all attacks from other combat styles. If you don't want to fight with a particular style, you can run - do not stop the event as this will reset all progress - and re-clear the last slayer area to roll a new Bane spawn. Bane has the same abilities no matter his combat style.
Melee Bane
Probably the hardest style as the modifiers stack up. Just let the 
Tidal Edge do the work as you pay attention to its attacks.
In some of the modifier variations, the final Bane will require a lot of manual eating.
Remember that you can re-roll his attack style by re-clearing the area, if he proves to be too much of a challenge. With good sense for eating and appropriate gear, this fight is not so much more difficult that it requires a re-roll.
Ranged Bane
Decent fight due to the 
Dragon + 
Centaur synergy adding a lot of extra damage. Nothing special, as 
Shockwave is a strong weapon.
Magic Bane
Generally the easiest style as you can use 
Incinerate for the duration of the fight for guaranteed burn and damage. You may wish to switch to any normal spell and start relying on 
Ocean Song once Bane reaches less than half HP, as the burn damage will drop off around half HP, however this is not really necessary. Alternatively, normal Magic and Ocean Song can be used for the entire fight too. Using Incinerate for the entire fight allows you to use 
Damage Reduction Potions instead of 
Diamond Luck as your hits are already guaranteed at 20k+ Accuracy Rating. Due to the extremely high chance for Incinerate to proc the Burn from Dragon tablets, the Dragon and 
Unicorn synergy ("You now heal for all BURNING damage you or the Dragon Familiar applies") can make this fight even simpler.
Fighter Amulet for 
Elite Amulet of Glory, or 
Elite Amulet of Defence.
Terran God Armor can be used if you're worried about dying, but is generally not recommended for anything except Bane.
Ring of Blade Echoes or 
Relentless Fury Ring
Relentless Fury Gloves and 
Wasteful Ring can be used in place of Elder Crown in the passive slot for Bane
Poison Virulence Gloves and 
Poison Virulence Ring can be used in place of their un-upgraded equivalents if you own them.
Burning Madness Gloves and 
Burning Madness Ring can be used in place of their un-upgraded equivalents if you own them.
Pipe Climb
Battleheart
Stone Skin
Cursed Lich lifesteal but is not required. 
Combat:
