Superior slayer monster

RS

A player fighting a Nechryarch within the Catacombs of Kourend.

Superior slayer monsters are more powerful versions of normal slayer monsters that have a 1/200 chance to spawn upon the death of one of its normal counterparts. They can be encountered after purchasing the unlock Bigger and Badder for 150 Slayer reward points from any Slayer master, and will only occur while on-task. This can be toggled on and off afterwards without loss of points.

When a superior slayer monster spawns, a message will appear in the chatbox, stating "A superior foe has appeared..." Killing a superior slayer monster will reward players with a generous amount of Slayer experience – for most, but not all of them, this is about 10 times the hitpoints of the superior monster. This experience will even be granted if the superior monster is slain after the completion of the corresponding slayer task.

They will also give three rolls on their lesser counterpart's drop table. Once a superior slayer monster has spawned it is only attackable by the spawning player. A superior monster will despawn from the world if ignored for 2 minutes. Should the player die while fighting it or teleport away, the monster will despawn soon after.

In addition, once one has appeared, another one will not spawn for that player until it is killed or despawns. In single combat areas, a superior slayer monster can be attacked even if you are under attack by another monster; when this happens, the standard monster will stop attacking you. In multicombat areas, it is possible for multiple superior slayer monsters to appear simultaneously if multiple monsters are killed at the same time.

Drops

Superior slayer monsters are guaranteed to drop an ensouled head (if applicable) and dark totem pieces (when killing one within the Catacombs of Kourend). Players are also ten times more likely to receive a clue scroll from killing one. In addition, superior slayer monsters have four unique drops shared among all superior slayer monsters:

• Imbued heart, which boosts the player's Magic level by 1 + 10% of your Magic level every seven minutes.
• Dust battlestaff, which when equipped provides an infinite amount of air and earth runes.
• Mist battlestaff, which when equipped provides an infinite amount of air and water runes.
• Eternal gem, which can be crafted into an eternal slayer ring.

Drop rate

The chance of rolling the unique drop table (UDT) is $\frac{1}{200 - \frac{(SlayerReq+55)^2}{125}}$

If the players rolls the unique drop table, there is then a 1/8 chance each of receiving an imbued heart or eternal gem, and a 3/8 chance each of receiving one of the battlestaves.

Thus, the formula of receiving an imbued heart or eternal gem is $\frac{1}{8* (200-\frac{(Slayer Req+55)^2}{125})}$

And the formula of receiving a dust or mist battlestave is $\frac{1}{\frac{8}{3}*(200-\frac{(Slayer Req+55)^2}{125})}$

Monsters

There are superior versions of the following monsters:

Normal variant	Superior variant	Image	Combat level	Hitpoints	UDT	Slayer XP
Crawling Hand	Crushing hand		45	55	1/171.2	550
Cave crawler	Chasm Crawler		68	64	1/166.2	600
Banshee	Screaming banshee		70	60	1/160.8	610
Twisted Banshee	Screaming twisted banshee		144	220		2200
Rock slug	Giant rockslug		86	77	1/155	770
Cockatrice	Cockathrice		89	95	1/148.8	950
Pyrefiend	Flaming pyrelord		97	126	1/142.2	1250
Basilisk	Monstrous basilisk		135	172	1/127.8	1700
Infernal Mage	Malevolent Mage		162	172	1/120	1750
Bloodveld	Insatiable Bloodveld		202	380	1/111.8	2900
Mutated Bloodveld	Insatiable mutated Bloodveld		278	411		4100
Jelly	Vitreous Jelly		206	190	1/108.4	1900
Warped Jelly	Vitreous warped Jelly		241	220		2200
Cave horror	Cave abomination		206	130	1/97.8	1300
Aberrant spectre	Abhorrent spectre		253	275	1/94.2	2500
Deviant spectre	Repugnant spectre		335	390		4085
Dust devil	Choke devil		264	300	1/84.8	3000
Kurask	King kurask		295	420	1/75	2767
Gargoyle	Marble gargoyle		349	270	1/64.8	3044
Nechryael	Nechryarch		300	320	1/54.2	3068
Greater Nechryael
Abyssal demon	Greater abyssal demon		342	400	1/43.2	4200
Dark beast	Night beast		314	640	1/31.8	6462
Smoke devil	Nuclear smoke devil		280	240	1/24.7	2400