The two enemies can be found at the top of Slayer Tower in Morytania from Bestmengqin's blog

Another version that is bigger than an ordinary monster is one called the Abyssal Sire which is the boss of RuneScape Gold Abyssal Demons. The players who have reached stage 85 in the Slayer can take on this monster in the Slayer task that is only solo-only. 

The most straightforward way to achieve this is through the use the Fairy Ring code D.I.P. Within Abyssal Nexus there are four rooms that Sire can be defeated, allowing several players to fight this monster simultaneously. Sire is famous for dropping items from the abyss, including Abyssal Whip and Abyssal Dagger that are both sold for several million dollars in Grand Exchange.

Similar similar to Dagannoth Kings - Grotesque Guardians are a couple of enemies known as Dusk and Dawn that are considered one boss. The two enemies can be found at the top of Slayer Tower in Morytania. To gain access to their rooms, players must obtain an entry key prior to their arrival.

The item is available only during Gargoyle and also allows fighting with Gargoyle's boss. After the fight , guardians may give away granite items, among which granite gloves and granite hammers are the most important. In addition, there is a chance of 1/1000 that Black Tourmaline Core drop which could be offered for sale at several million dollars.

One of the most well-known minigames of OSRS includes a fight against Six Barrows Brothers which while not in OSRS Items danger for an experienced player , can be an imminent threat to novice adventurers. You can encounter Ahrim The Blighted (level of 98 mage), Dharok the Wretched (level 115 Warrior), Guthan the Infested (level 115 Warrior), Karil the Tainted (level archer 98), Torag the Corrupted (level 115 Warrior) and Verac the defiled (level of 115 warrior).