Nechryael

Nechryael are level 138 demons that require level 80 Slayer to kill. They are found on the top floor, northwest corner of the Slayer Tower in Morytania and in the Chaos Tunnels. Their drops are very similar to the drops of greater demons but with a higher drop rate of crimson charms and death runes as well as being the only monster to drop rune boots.

Strategy
As nechryael are demons, the magical abilities of Silverlight and Darklight affect them. However, Holy water does not seem to have any effect on them.

Nechryael reside in the Slayer Tower or Chaos Tunnels. Cannons cannot be used as a means to kill them as both prevent the use of a cannon. Nechryael are considered weak for their level. With low lifepoints, low max hit and mediocre defence, they can be easily defeated with a powerful crush weapon (their weakness), like a Chaotic Maul or dual wield Drygore Maces. Slashing weapons are also good, but crush weapons are better.

A nechryael's main attack is a headbutt that hits up to 276 life points. When engaged in melee combat, a nechryael may randomly summon up to two level 136 death spawns to assist it. These death spawns have a considerably low max hit of 21 life points, but are very accurate so this can add up against lower level players.

Most players with a high defence choose to ignore the Death spawn completely because they inflict so little damage that they are not worth the time to avoid. However, death spawn attacks are unaffected by protection prayers as they aren't classed as melee, range or magic. This could be an issue if you choose to use Dharok's armour while killing nechryael.

Using a Guthan's set against a nechryael is extremely effective if the player has high combat stats.

Additionally, using burst or barrage spells or chinchompas on nechryael are a great source of crimson charms for players (in the chaos tunnels) because the rune drops can offset some of the cost of the runes or chinchompas.

For those who wish to mage or range nechryael in the Slayer Tower, there is a table in the northwest corner of the room that can be effectively used as a safespot. Another good strategy is to stand behind a death spawn so the nechryael will get trapped behind it.

Locations
Nechryael are most numerous here, but it is far from a bank. Players with 71 Agility can access an additional level with more Nechryael spawns. Using home teleport (Burthorpe, Ardougne or Lunar Isle recommended) and a slayer ring teleport cuts down time on banking trips.
 * Slayer Tower (top floor)
 * 71 Agility is highly recommended.

Another fast way to do trips at the Slayer Tower for players who have completed The Elder Kiln would be to use the slayer ring to teleport to the Slayer Tower, and then use a Tokkul-Zo, teleporting to the Fight Caves where a bank is only a few steps away.

There are a small number of nechryael in the far north of the Chaos Tunnels. This location is not recommended for slayers without the ability to use protect/Deflect Melee (keep in mind that protection/deflection prayers only avoid 50% of the damage caused by monsters), as the shortest route passes through gargoyles, mummies, black demons, bronze dragons and dagannoth; an anti-dragon shield or super antifire is also recommended. There is less room to avoid death spawn in the Chaos Tunnels. Banking can be done via home teleport or amulet of glory to Edgeville. This location is not recommended for players wishing to collect infernal ashes or other drops, due to the distance from a teleport location and the risks involved in returning to the nechryael chamber.
 * Chaos Tunnels
 * A dose of super antifire or a dragonfire shield/anti-dragon shield is recommended.

There are nechryael on the Occult floors, but this is not recommended as a method of completing a Slayer task as they appear randomly, and the chances of finding one is rare. They do not summon death spawn either, as these are different from other nechryaels outside of Daemonheim, and players doing this will receive no profit. They do have a unique drop that other nechryaels don't have, namely the doomcore staff.
 * Daemonheim
 * 71 Dungeoneering needed.

100% Drops

 * }

Armour

 * }

Weapons

 * }

Runes

 * }

Seeds

 * }

Other

 * }

Trivia

 * The word nechryael appears to be both the singular and plural as indicated by slayer masters when assigning them and giving tips on fighting them and by the Ring of Slaying when checking the progress of the assignment. In this way, nechryael is an irregular plural like sheep. This is also the case with Bloodveld, Dagannoth, Ankou, and Catablepon, among others.
 * The old graphics of Nechryael had a pentagram on its chest, a symbol of many religions and a sign that has many occult meanings.
 * Chaotic equipment will degrade more quickly when fighting nechryael because of attacks from their death spawns.

Nechryael Nechryael